Skip to main content
Top
Published in: Trials 1/2013

Open Access 01-12-2013 | Study protocol

Comparison of high and low intensity contact between secondary and primary care to detect people at ultra-high risk for psychosis: study protocol for a theory-based, cluster randomized controlled trial

Authors: Jesus Perez, Debra A Russo, Jan Stochl, Sarah Byford, Jorge Zimbron, Jonathan P Graffy, Michelle Painter, Tim J Croudace, Peter B Jones

Published in: Trials | Issue 1/2013

Login to get access

Abstract

Background

The early detection and referral to specialized services of young people at ultra-high risk (UHR) for psychosis may reduce the duration of untreated psychosis and, therefore, improve prognosis. General practitioners (GPs) are usually the healthcare professionals contacted first on the help-seeking pathway of these individuals.

Methods/Design

This is a cluster randomized controlled trial (cRCT) of primary care practices in Cambridgeshire and Peterborough, UK. Practices are randomly allocated into two groups in order to establish which is the most effective and cost-effective way to identify people at UHR for psychosis. One group will receive postal information about the local early intervention in psychosis service, including how to identify young people who may be in the early stages of a psychotic illness. The second group will receive the same information plus an additional, ongoing theory-based educational intervention with dedicated liaison practitioners to train clinical staff at each site. The primary outcome of this trial is count data over a 2-year period: the yield - number of UHR for psychosis referrals to a specialist early intervention in psychosis service - per primary care practice.

Discussion

There is little guidance on the essential components of effective and cost-effective educational interventions in primary mental health care. Furthermore, no study has demonstrated an effect of a theory-based intervention to help GPs identify young people at UHR for psychosis. This study protocol is underpinned by a robust scientific rationale that intends to address these limitations.

Trial registration

Current Controlled Trials ISRCTN70185866
Appendix
Available only for authorised users
Literature
1.
go back to reference Yung AR: Commentary: the schizophrenia prodrome: a high-risk concept. Schizophr Bull. 2003, 29 (4): 859-865.CrossRefPubMed Yung AR: Commentary: the schizophrenia prodrome: a high-risk concept. Schizophr Bull. 2003, 29 (4): 859-865.CrossRefPubMed
2.
go back to reference Woods SW, Addington J, Cadenhead KS, Cannon TD, Cornblatt BA, Heinssen R, Perkins DO, Seidman LJ, Tsuang MT, Walker EF, McGlashan TH: Validity of the prodromal risk syndrome for first psychosis: findings from the north American prodrome longitudinal study. Schizophr Bull. 2009, 35 (5): 894-908.CrossRefPubMedPubMedCentral Woods SW, Addington J, Cadenhead KS, Cannon TD, Cornblatt BA, Heinssen R, Perkins DO, Seidman LJ, Tsuang MT, Walker EF, McGlashan TH: Validity of the prodromal risk syndrome for first psychosis: findings from the north American prodrome longitudinal study. Schizophr Bull. 2009, 35 (5): 894-908.CrossRefPubMedPubMedCentral
3.
go back to reference Platz C, Albrecht DS, Cattapan-Ludewig K, Dvorsky D, Arbach D, Brenner HD, Simon AE: Help-seeking pathways in early psychosis. Soc Psychiatry Psychiatr Epidemiol. 2006, 41: 967-974.CrossRefPubMedPubMedCentral Platz C, Albrecht DS, Cattapan-Ludewig K, Dvorsky D, Arbach D, Brenner HD, Simon AE: Help-seeking pathways in early psychosis. Soc Psychiatry Psychiatr Epidemiol. 2006, 41: 967-974.CrossRefPubMedPubMedCentral
4.
go back to reference Simon A, Lester HE, Tait L, Stip E, Roy P, Conrad G, Hunt J, Epstein I, Larsen T, Amminger P, Holub D, Wenigová B, Turner M, Berger G, O'Donnell C, Umbricht D: The international study on general practitioners and early psychosis (IGPS). Schizophr Res. 2009, 108: 182-190.CrossRefPubMed Simon A, Lester HE, Tait L, Stip E, Roy P, Conrad G, Hunt J, Epstein I, Larsen T, Amminger P, Holub D, Wenigová B, Turner M, Berger G, O'Donnell C, Umbricht D: The international study on general practitioners and early psychosis (IGPS). Schizophr Res. 2009, 108: 182-190.CrossRefPubMed
5.
go back to reference Phillips LJ, Leicester SB, O'Dwyer LE, Francey SM, Koutsogiannis J, Abdel-Baki A, Kelly D, Jones S, Vay C, Yung AR, McGorry PD: The PACE Clinic: identification and management of young people at “ultra” high risk of psychosis. J Psychiatr Pract. 2002, 8 (5): 255-269.CrossRefPubMed Phillips LJ, Leicester SB, O'Dwyer LE, Francey SM, Koutsogiannis J, Abdel-Baki A, Kelly D, Jones S, Vay C, Yung AR, McGorry PD: The PACE Clinic: identification and management of young people at “ultra” high risk of psychosis. J Psychiatr Pract. 2002, 8 (5): 255-269.CrossRefPubMed
6.
go back to reference Hegelstad WT, Larsen TK, Auestad B, Evensen J, Haahr U, Joa I, Johannesen JO, Langeveld J, Melle I, Opjordsmoen S, Rossberg JI, Rund BR, Simonsen E, Sundet K, Vaglum P, Friis S, McGlashan T: Long-term follow-up of the TIPS early detection in psychosis study: effects on 10-year outcome. Am J Psychiatry. 2012, 169 (4): 374-380.CrossRefPubMed Hegelstad WT, Larsen TK, Auestad B, Evensen J, Haahr U, Joa I, Johannesen JO, Langeveld J, Melle I, Opjordsmoen S, Rossberg JI, Rund BR, Simonsen E, Sundet K, Vaglum P, Friis S, McGlashan T: Long-term follow-up of the TIPS early detection in psychosis study: effects on 10-year outcome. Am J Psychiatry. 2012, 169 (4): 374-380.CrossRefPubMed
7.
go back to reference Gilbody S, Whitty P, Grimshaw J, Thomas R: Educational and organisational interventions to improve the management of depression in primary care: a systematic review. JAMA. 2003, 289: 3145-3151.CrossRefPubMed Gilbody S, Whitty P, Grimshaw J, Thomas R: Educational and organisational interventions to improve the management of depression in primary care: a systematic review. JAMA. 2003, 289: 3145-3151.CrossRefPubMed
8.
go back to reference Lester HE, Birchwood M, Freemantle N, Michail M, Tait L: REDIRECT: cluster randomised controlled trial of GP training in first-episode psychosis. Br J Gen Pract. 2009, 59: 183-190.CrossRef Lester HE, Birchwood M, Freemantle N, Michail M, Tait L: REDIRECT: cluster randomised controlled trial of GP training in first-episode psychosis. Br J Gen Pract. 2009, 59: 183-190.CrossRef
9.
go back to reference Medical Research Council: Developing and Evaluating Complex Interventions: New Guidance. 2008, London: Medical Research Council Medical Research Council: Developing and Evaluating Complex Interventions: New Guidance. 2008, London: Medical Research Council
10.
go back to reference Yung AR, Yuen HP, McGorry PD, Phillips LJ, Kelly D, Dell'Olio M, Francey SM, Cosgrave EM, Killackey E, Stanford C, Godfrey K, Buckby J: Mapping the onset of psychosis: the comprehensive assessment of at-risk mental states. Aust N Z J Psychiatry. 2005, 39 (11–12): 964-971.CrossRefPubMed Yung AR, Yuen HP, McGorry PD, Phillips LJ, Kelly D, Dell'Olio M, Francey SM, Cosgrave EM, Killackey E, Stanford C, Godfrey K, Buckby J: Mapping the onset of psychosis: the comprehensive assessment of at-risk mental states. Aust N Z J Psychiatry. 2005, 39 (11–12): 964-971.CrossRefPubMed
11.
go back to reference Crawford MJ, Killaspy H, Kalaitzaki E, Barrett B, Byford S, Patterson S, Soteriou T, ONeill FA, Clayton K, Maratos A, Barnes TR, Osborn D, Johnson T, King M, Tyrer P, Waller D: The MATISSE study: a randomised trial of group art therapy for people with schizophrenia. BMC Psychiatry. 2010, 10: 65-CrossRefPubMedPubMedCentral Crawford MJ, Killaspy H, Kalaitzaki E, Barrett B, Byford S, Patterson S, Soteriou T, ONeill FA, Clayton K, Maratos A, Barnes TR, Osborn D, Johnson T, King M, Tyrer P, Waller D: The MATISSE study: a randomised trial of group art therapy for people with schizophrenia. BMC Psychiatry. 2010, 10: 65-CrossRefPubMedPubMedCentral
12.
go back to reference Flood C, Byford S, Henderson C, Leese M, Thornicroft G, Sutherby K, Szmukler G: Joint crisis plans for people with psychosis: economic evaluation of a randomised controlled trial. BMJ. 2006, 333: 729-CrossRefPubMedPubMedCentral Flood C, Byford S, Henderson C, Leese M, Thornicroft G, Sutherby K, Szmukler G: Joint crisis plans for people with psychosis: economic evaluation of a randomised controlled trial. BMJ. 2006, 333: 729-CrossRefPubMedPubMedCentral
13.
go back to reference McCrone P, Knapp M: Economic evaluation of early intervention services. BJP. 2007, 191 (Suppl 51): 19-22.CrossRef McCrone P, Knapp M: Economic evaluation of early intervention services. BJP. 2007, 191 (Suppl 51): 19-22.CrossRef
14.
go back to reference Kirkbride JB, Fearon P, Morgan C, Dazzan P, Morgan K, Tarrant J, Lloyd T, Holloway J, Hutchinson G, Leff JP, Mallett RM, Harrison GL, Murray RM, Jones PB: Heterogeneity in incidence rates of schizophrenia and other psychotic syndromes: findings from the 3-centre AeSOP study. Arch Gen Psychiatry. 2006, 63 (3): 250-258.CrossRefPubMed Kirkbride JB, Fearon P, Morgan C, Dazzan P, Morgan K, Tarrant J, Lloyd T, Holloway J, Hutchinson G, Leff JP, Mallett RM, Harrison GL, Murray RM, Jones PB: Heterogeneity in incidence rates of schizophrenia and other psychotic syndromes: findings from the 3-centre AeSOP study. Arch Gen Psychiatry. 2006, 63 (3): 250-258.CrossRefPubMed
15.
go back to reference Curtis L: Unit Costs of Health and Social Care 2012. 2012, Kent: Personal Social Services Research Unit Curtis L: Unit Costs of Health and Social Care 2012. 2012, Kent: Personal Social Services Research Unit
16.
go back to reference Joint Formulary Committee: British National Formulary (BNF) 64. 2012, London: BMJ Group and Pharmaceutical Press Joint Formulary Committee: British National Formulary (BNF) 64. 2012, London: BMJ Group and Pharmaceutical Press
17.
go back to reference Department of Health: NHS Reference Costs. 2012, London: Department of Health Department of Health: NHS Reference Costs. 2012, London: Department of Health
18.
go back to reference Dubourg R, Hamed J: The Economic and Social Costs of Crime against Individuals and Households 2003/04. 2005, London: Home Office Dubourg R, Hamed J: The Economic and Social Costs of Crime against Individuals and Households 2003/04. 2005, London: Home Office
19.
go back to reference HM Prison Service: Prison Service Annual Report and Accounts. 2012, London: The Stationery Office HM Prison Service: Prison Service Annual Report and Accounts. 2012, London: The Stationery Office
20.
go back to reference Koopmanschap MA, Rutten F: A practical guide for calculating indirect costs of disease. Pharmacoeconomics. 1996, 10: 460-466.CrossRefPubMed Koopmanschap MA, Rutten F: A practical guide for calculating indirect costs of disease. Pharmacoeconomics. 1996, 10: 460-466.CrossRefPubMed
21.
go back to reference Barber JA, Thompson SG: Analysis and interpretation of cost data in randomised controlled trials: review of published studies. BMJ. 1998, 317: 1195-1200.CrossRefPubMedPubMedCentral Barber JA, Thompson SG: Analysis and interpretation of cost data in randomised controlled trials: review of published studies. BMJ. 1998, 317: 1195-1200.CrossRefPubMedPubMedCentral
22.
go back to reference Efron B, Tibshirani RJ: An Introduction to the Bootstrap. 1993, New York: Chapman & HallCrossRef Efron B, Tibshirani RJ: An Introduction to the Bootstrap. 1993, New York: Chapman & HallCrossRef
23.
go back to reference Stinnett AA, Mullahy J: Net health benefits: a new framework for the analysis of uncertainty in cost-effectiveness analysis. Med Decis Making. 1998, 18: S68-S80.CrossRefPubMed Stinnett AA, Mullahy J: Net health benefits: a new framework for the analysis of uncertainty in cost-effectiveness analysis. Med Decis Making. 1998, 18: S68-S80.CrossRefPubMed
24.
go back to reference Gomes M, Ng ES, Grieve R, Nixon R, Carpenter J, Thompson S: Developing appropriate methods for cost-effectiveness analysis of cluster randomized trials. Med Decis Making. 2012, 32: 350-361.CrossRefPubMedPubMedCentral Gomes M, Ng ES, Grieve R, Nixon R, Carpenter J, Thompson S: Developing appropriate methods for cost-effectiveness analysis of cluster randomized trials. Med Decis Making. 2012, 32: 350-361.CrossRefPubMedPubMedCentral
25.
go back to reference Grieve R, Nixon R, Thompson SG, Normand C: Using multilevelmodels for assessing the variability of multinational resource use and cost data. Health Economics. 2005, 14: 185-196.CrossRefPubMed Grieve R, Nixon R, Thompson SG, Normand C: Using multilevelmodels for assessing the variability of multinational resource use and cost data. Health Economics. 2005, 14: 185-196.CrossRefPubMed
26.
go back to reference Fenwick E, Byford S: A guide to cost-effectiveness acceptability curves. Br J Psychiatry. 2005, 187: 106-108.CrossRefPubMed Fenwick E, Byford S: A guide to cost-effectiveness acceptability curves. Br J Psychiatry. 2005, 187: 106-108.CrossRefPubMed
27.
go back to reference Phillips Z, Ginnelly L, Sculpher M, Claxton K, Golder S, Riesmsa R, Woolacoot N, Glanville J: Review of guidelines for good practice in decision-analytic modelling in health technology assessment. Health Technol Assess. 2004, 8 (36): 1-158.CrossRef Phillips Z, Ginnelly L, Sculpher M, Claxton K, Golder S, Riesmsa R, Woolacoot N, Glanville J: Review of guidelines for good practice in decision-analytic modelling in health technology assessment. Health Technol Assess. 2004, 8 (36): 1-158.CrossRef
28.
go back to reference Coyle D, Lee KM: Evidence-based economic evaluation: how the use of different data sources can impact results. Evidence-based Health Economics. Edited by: Donaldson C, Mugford M, Vale L. 2002, London: BMJ Books, 55-66. Coyle D, Lee KM: Evidence-based economic evaluation: how the use of different data sources can impact results. Evidence-based Health Economics. Edited by: Donaldson C, Mugford M, Vale L. 2002, London: BMJ Books, 55-66.
29.
go back to reference Barton P, Bryan S, Robinson S: Modelling in the economic evaluation of health care: selecting the appropriate approach. J Health Serv Res Policy. 2004, 9 (2): 110-828.CrossRefPubMed Barton P, Bryan S, Robinson S: Modelling in the economic evaluation of health care: selecting the appropriate approach. J Health Serv Res Policy. 2004, 9 (2): 110-828.CrossRefPubMed
31.
go back to reference Cabana MD, Rand CS, Powe NR, Wu AW, Wilson MH, Abboud PA, Rubin HR: Why don’t physicians follow clinical practice guidelines? A framework for improvement. JAMA. 1999, 282 (15): 1458-1465.CrossRefPubMed Cabana MD, Rand CS, Powe NR, Wu AW, Wilson MH, Abboud PA, Rubin HR: Why don’t physicians follow clinical practice guidelines? A framework for improvement. JAMA. 1999, 282 (15): 1458-1465.CrossRefPubMed
32.
go back to reference Howe A, Ashton K, Hooper L: Effectiveness of educational interventions in primary care mental health: a qualitative systematic review. Primary Care Comm Psychiatr. 2006, 11 (4): 167-177.CrossRef Howe A, Ashton K, Hooper L: Effectiveness of educational interventions in primary care mental health: a qualitative systematic review. Primary Care Comm Psychiatr. 2006, 11 (4): 167-177.CrossRef
33.
go back to reference Hodges B, Inch C, Silver I: Improving the psychiatric knowledge, skills, and attitudes of primary care physicians, 1950–2000: a review. Am J Psychiatry. 2001, 158 (10): 1579-1586.CrossRefPubMed Hodges B, Inch C, Silver I: Improving the psychiatric knowledge, skills, and attitudes of primary care physicians, 1950–2000: a review. Am J Psychiatry. 2001, 158 (10): 1579-1586.CrossRefPubMed
34.
go back to reference Robertson R, Jochelson K: Interventions that Change Clinician Behavior: Mapping the Literature. 2006, London: National Institute for Health and Care Excellence Robertson R, Jochelson K: Interventions that Change Clinician Behavior: Mapping the Literature. 2006, London: National Institute for Health and Care Excellence
35.
go back to reference Lester HE, Tait L, Keera A, Birchwood M, Freemantle N, Patterson P: The development and implementation of an educational intervention on first episode psychosis for primary care. Med Ed. 2005, 39: 1006-1014.CrossRef Lester HE, Tait L, Keera A, Birchwood M, Freemantle N, Patterson P: The development and implementation of an educational intervention on first episode psychosis for primary care. Med Ed. 2005, 39: 1006-1014.CrossRef
36.
go back to reference Craik FIM, Lockhart RS: Levels of processing: a framework for memory research. J Verb Learn Verb Beh. 1972, 11: 671-684.CrossRef Craik FIM, Lockhart RS: Levels of processing: a framework for memory research. J Verb Learn Verb Beh. 1972, 11: 671-684.CrossRef
37.
go back to reference Goering M, Wilson W: Implementing preterm labour guidelines: a collaborative care improvement process. J Perinat Neonatal Nurs. 2002, 16 (1): 47-57.CrossRefPubMed Goering M, Wilson W: Implementing preterm labour guidelines: a collaborative care improvement process. J Perinat Neonatal Nurs. 2002, 16 (1): 47-57.CrossRefPubMed
38.
go back to reference Foy R, Francis JJ, Johnston M, Eccles M, Lecouturier J, Bamford C, Grimshaw J: The development of a theory-based intervention to promote appropriate disclosure of a diagnosis of dementia. BMC Health Serv Res. 2007, 7: 207-CrossRefPubMedPubMedCentral Foy R, Francis JJ, Johnston M, Eccles M, Lecouturier J, Bamford C, Grimshaw J: The development of a theory-based intervention to promote appropriate disclosure of a diagnosis of dementia. BMC Health Serv Res. 2007, 7: 207-CrossRefPubMedPubMedCentral
39.
go back to reference Hrisos S, Eccles M, Johnston M, Francis J, Kaner EFS, Steen N, Grimshaw J: Developing the content of two behavioural interventions: using theory-based interventions to promote GP management of upper respiratory tract infection without prescribing antibiotics #1. BMC Health Serv Res. 2008, 8: 11-CrossRefPubMedPubMedCentral Hrisos S, Eccles M, Johnston M, Francis J, Kaner EFS, Steen N, Grimshaw J: Developing the content of two behavioural interventions: using theory-based interventions to promote GP management of upper respiratory tract infection without prescribing antibiotics #1. BMC Health Serv Res. 2008, 8: 11-CrossRefPubMedPubMedCentral
40.
go back to reference Eccles MP, Hrisos S, Francis J, Kaner EF, Dickinson HO, Beyer F, Johnston M: Do self- reported intentions predict clinicians' behaviour: a systematic review. Implement Sci. 2006, 1 (28): 10- Eccles MP, Hrisos S, Francis J, Kaner EF, Dickinson HO, Beyer F, Johnston M: Do self- reported intentions predict clinicians' behaviour: a systematic review. Implement Sci. 2006, 1 (28): 10-
41.
go back to reference Bonetti D, Eccles M, Johnston M, Steen IN, Grimshaw J, Baker R, Walker A, Pitts N: Guiding the design and selection of interventions to influence the implementation of evidence-based practice: an experimental simulation of a complex intervention trial. Soc Sci Med. 2005, 60: 2135-2147.CrossRefPubMed Bonetti D, Eccles M, Johnston M, Steen IN, Grimshaw J, Baker R, Walker A, Pitts N: Guiding the design and selection of interventions to influence the implementation of evidence-based practice: an experimental simulation of a complex intervention trial. Soc Sci Med. 2005, 60: 2135-2147.CrossRefPubMed
42.
go back to reference Michie S, Pilling S, Garety P, Whitty P, Eccles MP, Johnston M, Simmons J: Difficulties implementing a mental health guideline: an exploratory investigation using psychological theory. Implement Sci. 2007, 2: 8-CrossRefPubMedPubMedCentral Michie S, Pilling S, Garety P, Whitty P, Eccles MP, Johnston M, Simmons J: Difficulties implementing a mental health guideline: an exploratory investigation using psychological theory. Implement Sci. 2007, 2: 8-CrossRefPubMedPubMedCentral
43.
go back to reference Ajzen I: From intentions to action: a theory of planned behavior. Action Control: From Cognitions to Behaviors. Edited by: Kuhl J, Beckman J. 1985, New York: Springer, 11-39.CrossRef Ajzen I: From intentions to action: a theory of planned behavior. Action Control: From Cognitions to Behaviors. Edited by: Kuhl J, Beckman J. 1985, New York: Springer, 11-39.CrossRef
44.
go back to reference Ajzen I: The theory of planned behavior. Org Behavior Human Decision Proc. 1991, 50: 179-211.CrossRef Ajzen I: The theory of planned behavior. Org Behavior Human Decision Proc. 1991, 50: 179-211.CrossRef
45.
go back to reference Walker A, Watson M, Grimshaw J, Bond C: Applying the theory of planned behaviour to pharmacists' beliefs and intentions about the treatment of vaginal candidiasis with non-prescription medicines. Fam Pract. 2004, 21: 670-676.CrossRefPubMed Walker A, Watson M, Grimshaw J, Bond C: Applying the theory of planned behaviour to pharmacists' beliefs and intentions about the treatment of vaginal candidiasis with non-prescription medicines. Fam Pract. 2004, 21: 670-676.CrossRefPubMed
46.
go back to reference Ramsay CR, Thomas RE, Croal BL, Grimshaw JM, Eccles MP: Using the theory of planned behaviour as a process evaluation tool in randomised trials of knowledge translation strategies: a case study from UK primary care. Implement Sci. 2010, 5: 71-CrossRefPubMedPubMedCentral Ramsay CR, Thomas RE, Croal BL, Grimshaw JM, Eccles MP: Using the theory of planned behaviour as a process evaluation tool in randomised trials of knowledge translation strategies: a case study from UK primary care. Implement Sci. 2010, 5: 71-CrossRefPubMedPubMedCentral
47.
go back to reference Green H, Johnston O, Cabrini S, Fornai G, Kendrick T: General practitioner attitudes towards referral of eating-disordered patients: a vignette study based on the theory of planned behaviour. Ment Health Fam Med. 2008, 5 (4): 213-218.PubMedPubMedCentral Green H, Johnston O, Cabrini S, Fornai G, Kendrick T: General practitioner attitudes towards referral of eating-disordered patients: a vignette study based on the theory of planned behaviour. Ment Health Fam Med. 2008, 5 (4): 213-218.PubMedPubMedCentral
48.
go back to reference Ajzen I: Constructing a TpB Questionnaire: Conceptual and Methodological Considerations. 2006, Boston: UMASS Ajzen I: Constructing a TpB Questionnaire: Conceptual and Methodological Considerations. 2006, Boston: UMASS
49.
go back to reference Francis JJ, Eccles MP, Johnston M, Walker A, Grimshaw J, Foy R, Kaner EFS, Smith L, Bonetti D: Constructing Questionnaires Based on the Theory of Planned Behaviour. A Manual for Health Services Researchers. 2004, Newcastle upon Tyne: Centre for Health Services Research Francis JJ, Eccles MP, Johnston M, Walker A, Grimshaw J, Foy R, Kaner EFS, Smith L, Bonetti D: Constructing Questionnaires Based on the Theory of Planned Behaviour. A Manual for Health Services Researchers. 2004, Newcastle upon Tyne: Centre for Health Services Research
50.
go back to reference Russo DA, Stochl J, Croudace TJ, Graffy JP, Youens J, Jones PB, Perez J: Use of the theory of planned behaviour to assess factors influencing the identification of individuals at ultra-high risk for psychosis in primary care. Early Interv Psychiatry. 2012, 6: 265-275.CrossRefPubMed Russo DA, Stochl J, Croudace TJ, Graffy JP, Youens J, Jones PB, Perez J: Use of the theory of planned behaviour to assess factors influencing the identification of individuals at ultra-high risk for psychosis in primary care. Early Interv Psychiatry. 2012, 6: 265-275.CrossRefPubMed
51.
go back to reference Fife-Schaw CR, Sheeran P, Norman P: Simulating behaviour change interventions based on the theory of planned behavior: impacts on intention and action. BJSP. 2007, 46: 43-68. Fife-Schaw CR, Sheeran P, Norman P: Simulating behaviour change interventions based on the theory of planned behavior: impacts on intention and action. BJSP. 2007, 46: 43-68.
52.
go back to reference Abraham C, Michie S: A taxonomy of behaviour change techniques used in interventions. Health Psychol. 2008, 27: 379-387.CrossRefPubMed Abraham C, Michie S: A taxonomy of behaviour change techniques used in interventions. Health Psychol. 2008, 27: 379-387.CrossRefPubMed
53.
go back to reference Michie S, Johnston M, Francis J, Hardeman W, Eccles M: From theory to intervention: mapping theoretically derived behavioural determinants to behaviour change techniques. Appl Psychol Int Rev. 2008, 57: 660-680.CrossRef Michie S, Johnston M, Francis J, Hardeman W, Eccles M: From theory to intervention: mapping theoretically derived behavioural determinants to behaviour change techniques. Appl Psychol Int Rev. 2008, 57: 660-680.CrossRef
54.
55.
go back to reference Bauchner H, Simpson L, Chessare J: Changing physician behaviour. Arch Dis Childhood. 2001, 84: 459-462.CrossRef Bauchner H, Simpson L, Chessare J: Changing physician behaviour. Arch Dis Childhood. 2001, 84: 459-462.CrossRef
56.
go back to reference Wensing M, Grol R: Multifaceted interventions. Improving Patient Care: The Implementation of Change in Clinical Practice. Edited by: Grol R, Wensing M, Eccles M. 2005, Edinburgh: Elsevier Wensing M, Grol R: Multifaceted interventions. Improving Patient Care: The Implementation of Change in Clinical Practice. Edited by: Grol R, Wensing M, Eccles M. 2005, Edinburgh: Elsevier
57.
go back to reference Richens Y, Rycroft-Malone J, Morrell C: Getting guidelines into practice: a literature review. Nursing Standard. 2004, 18 (50): 33-40.CrossRef Richens Y, Rycroft-Malone J, Morrell C: Getting guidelines into practice: a literature review. Nursing Standard. 2004, 18 (50): 33-40.CrossRef
58.
go back to reference Ajzen I: Behavioural Interventions Based on the Theory of Planned Behaviour. 2009, Boston: UMASS Ajzen I: Behavioural Interventions Based on the Theory of Planned Behaviour. 2009, Boston: UMASS
59.
go back to reference Sutton S: Testing attitude-behaviour theories using non-experimental data: an examination of some hidden assumptions. ERSP. 2002, 13: 293-323. Sutton S: Testing attitude-behaviour theories using non-experimental data: an examination of some hidden assumptions. ERSP. 2002, 13: 293-323.
60.
go back to reference Harvey G, Loftus-Hills A, Rycroft-Malone J, Titchen A, Kitson A, McCormack B, Seers K: Getting evidence into practice: the role and function of facilitation. J Adv Nurs. 2002, 37 (6): 577-588.CrossRefPubMed Harvey G, Loftus-Hills A, Rycroft-Malone J, Titchen A, Kitson A, McCormack B, Seers K: Getting evidence into practice: the role and function of facilitation. J Adv Nurs. 2002, 37 (6): 577-588.CrossRefPubMed
61.
go back to reference Alvanzo AH, Cohen GM, Nettleman M: Changing physician behaviour: half-empty or half-full?. Clin GovernInt J. 2003, 8 (1): 69-78.CrossRef Alvanzo AH, Cohen GM, Nettleman M: Changing physician behaviour: half-empty or half-full?. Clin GovernInt J. 2003, 8 (1): 69-78.CrossRef
62.
go back to reference Bandura A: Self-efficacy: The Exercise of Control. 1997, New York: Freeman Bandura A: Self-efficacy: The Exercise of Control. 1997, New York: Freeman
63.
go back to reference Pajares F: Current directions in self-efficacy research. Advances in Motivation and Achievement. Volume 10. Edited by: Maehr M, Pintrich PR. 1997, Bingley: Emerald Group Publishing Limited, 1-49. Pajares F: Current directions in self-efficacy research. Advances in Motivation and Achievement. Volume 10. Edited by: Maehr M, Pintrich PR. 1997, Bingley: Emerald Group Publishing Limited, 1-49.
64.
go back to reference Hong SW, Ching TY, Fung JP, Seto WL: The employment of ward opinion leaders for continuing education in the hospital. Medical Teacher. 1990, 12: 209-217.CrossRefPubMed Hong SW, Ching TY, Fung JP, Seto WL: The employment of ward opinion leaders for continuing education in the hospital. Medical Teacher. 1990, 12: 209-217.CrossRefPubMed
65.
go back to reference Valente TW, Pumpuang P: Identifying opinion leaders to promote behavior change. Health Educ Behav. 2007, 34: 881-CrossRefPubMed Valente TW, Pumpuang P: Identifying opinion leaders to promote behavior change. Health Educ Behav. 2007, 34: 881-CrossRefPubMed
66.
go back to reference Power P, Iacoponi E, Reynolds N, Fisher H, Russell M, Garety P, McGuire P, Craig T: The Lambeth early onset crisis assessment team study: general practitioner education and access to an early detection team in first-episode psychosis. Br J Psychiatry Suppl. 2007, 191 (Suppl 51): 133-139.CrossRef Power P, Iacoponi E, Reynolds N, Fisher H, Russell M, Garety P, McGuire P, Craig T: The Lambeth early onset crisis assessment team study: general practitioner education and access to an early detection team in first-episode psychosis. Br J Psychiatry Suppl. 2007, 191 (Suppl 51): 133-139.CrossRef
67.
go back to reference Simon A, Jegerlehner S, Müller T, Cattapan-Ludewig K, Frey P, Grossenbacher M, Seifritz E, Umbricht D: Early schizophrenia in primary care: a randomized sensitization study. BJGP. 2010, 60 (578): 353-359.CrossRef Simon A, Jegerlehner S, Müller T, Cattapan-Ludewig K, Frey P, Grossenbacher M, Seifritz E, Umbricht D: Early schizophrenia in primary care: a randomized sensitization study. BJGP. 2010, 60 (578): 353-359.CrossRef
68.
go back to reference Darker CD, French DP, Eves FF, Sniehotta FF: An intervention to promote walking amongst the general population based on an ‘extended’ theory of planned behaviour: a waiting list randomised controlled trial. Psychol Health. 2010, 25: 71-88.CrossRefPubMed Darker CD, French DP, Eves FF, Sniehotta FF: An intervention to promote walking amongst the general population based on an ‘extended’ theory of planned behaviour: a waiting list randomised controlled trial. Psychol Health. 2010, 25: 71-88.CrossRefPubMed
Metadata
Title
Comparison of high and low intensity contact between secondary and primary care to detect people at ultra-high risk for psychosis: study protocol for a theory-based, cluster randomized controlled trial
Authors
Jesus Perez
Debra A Russo
Jan Stochl
Sarah Byford
Jorge Zimbron
Jonathan P Graffy
Michelle Painter
Tim J Croudace
Peter B Jones
Publication date
01-12-2013
Publisher
BioMed Central
Published in
Trials / Issue 1/2013
Electronic ISSN: 1745-6215
DOI
https://doi.org/10.1186/1745-6215-14-222

Other articles of this Issue 1/2013

Trials 1/2013 Go to the issue