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Published in: Health and Quality of Life Outcomes 1/2015

Open Access 01-12-2015 | Research

Early intervention influences positively quality of life as reported by prematurely born children at age nine and their parents; a randomized clinical trial

Authors: Inger Pauline Landsem, Bjørn Helge Handegård, Stein Erik Ulvund, Per Ivar Kaaresen, John A Rønning

Published in: Health and Quality of Life Outcomes | Issue 1/2015

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Abstract

Background

The Tromsø Intervention Study on Preterms evaluates an early, sensitizing intervention given to parents of prematurely born children (birth-weight < 2000 g). The current study investigated the potential influence of the intervention on children’s self-reported and parental proxy-reported quality of life (QoL) at children’s age of nine.

Methods

Participants were randomized to either intervention (PI, n = 72) or preterm control (PC, n = 74) in the neonatal care unit, while healthy term-born infants were recruited to a term reference group (TR, n = 75). The intervention was a modified version of the Mother-Infant Transaction Program, and comprised eight one-hour sessions during the last week before discharge and four home visits at 1, 2, 4 and 12 weeks post-discharge. The two control groups received care in accordance with written guidelines drawn up at the hospital. Participants and parents reported QoL independently on the Kinder Lebensqualität Fragebogen (KINDL) questionnaire. Differences between groups were analyzed by SPSS; Linear Mixed Models and parent–child agreement were analyzed and compared by intra-class correlations within each group.

Results

On average, children in all groups reported high levels of well-being. The PI children reported better physical well-being than the PC children (p = 0.002). In all other aspects of QoL both the PI and the PC children reported at similar levels as the term reference group. PI parents reported better emotional wellbeing (p = 0.05) and a higher level of contentment in school (p = 0.003) compared with PC parents. Parent–child agreement was significantly weaker in the PI group than in the PC group on dimensions such as emotional well-being and relationships with friends (p < 0.05). PI parents reported QoL similar to parents of terms on all aspects except the subscale self-esteem, while PC parents generally reported moderately lower QoL than TR parents.

Conclusions

This early intervention appears to have generated long-lasting positive effects, improving perceived physical well-being among prematurely born children and parent’s perception of these children’s QoL in middle childhood.

Trial registration

Clinical Trials Gov NCT00222456.
Literature
1.
go back to reference Colver A, Jessen C. Measurement of health status and quality of life in neonatal follow-up studies. Semin Neonatol. 2000;5:149–57.CrossRefPubMed Colver A, Jessen C. Measurement of health status and quality of life in neonatal follow-up studies. Semin Neonatol. 2000;5:149–57.CrossRefPubMed
2.
go back to reference Aarnoudse-Moens C, Weisglas-Kuperus N, van Goudoever JB, Oosterlaan J. Meta-analysis of neurobehavioral outcomes in very preterm and/or very low birth weight children. Pediatrics. 2009;124(2):717–28.CrossRefPubMed Aarnoudse-Moens C, Weisglas-Kuperus N, van Goudoever JB, Oosterlaan J. Meta-analysis of neurobehavioral outcomes in very preterm and/or very low birth weight children. Pediatrics. 2009;124(2):717–28.CrossRefPubMed
3.
go back to reference Aylward GP. Neurodevelopmental outcomes of infants born prematurely. Dev Behav Pediatr. 2005;26(6):427–41.CrossRef Aylward GP. Neurodevelopmental outcomes of infants born prematurely. Dev Behav Pediatr. 2005;26(6):427–41.CrossRef
4.
go back to reference Fawke J. Neurological outcomes following preterm birth. Semin Fetal Neonat Med. 2007;12:374–82.CrossRef Fawke J. Neurological outcomes following preterm birth. Semin Fetal Neonat Med. 2007;12:374–82.CrossRef
5.
go back to reference Bhutta AT, Cleves MA, Casey PH, Cradock MM, Anand KJS. Cognitive and behavioral outcomes of school-aged children who were born preterm. JAMA. 2002;288(2):728–37.CrossRefPubMed Bhutta AT, Cleves MA, Casey PH, Cradock MM, Anand KJS. Cognitive and behavioral outcomes of school-aged children who were born preterm. JAMA. 2002;288(2):728–37.CrossRefPubMed
6.
go back to reference Saigal S, Tyson J. Measurement of quality of life of survivors of neonatal intensive care: critique and implications. Semin Neonatol. 2008;32:59–66. Saigal S, Tyson J. Measurement of quality of life of survivors of neonatal intensive care: critique and implications. Semin Neonatol. 2008;32:59–66.
7.
go back to reference Bastiaansen D, Koot HM, Ferdinand RF. Psychopathology in children: improvement of quality of life without psychiatric symptom reduction? Eur Child Adolesc Psychiatry. 2005;14:364–70.CrossRefPubMed Bastiaansen D, Koot HM, Ferdinand RF. Psychopathology in children: improvement of quality of life without psychiatric symptom reduction? Eur Child Adolesc Psychiatry. 2005;14:364–70.CrossRefPubMed
8.
go back to reference World Health Organization. The world health organization QoL assessment (WHOQOL): position paper from the World Health Organization. Soc Sci Med. 1995;41(10):1403–9.CrossRef World Health Organization. The world health organization QoL assessment (WHOQOL): position paper from the World Health Organization. Soc Sci Med. 1995;41(10):1403–9.CrossRef
9.
go back to reference Jozefiak T. Quality of Life and Mental Health in Children and Adolescents: Child and Parent Perspectives. Trondheim, Norway: PhD thesis. Norwegian University of Science and Technology, NTNU. Faculty of Medicine, Department of Neuroscience; 2009. Jozefiak T. Quality of Life and Mental Health in Children and Adolescents: Child and Parent Perspectives. Trondheim, Norway: PhD thesis. Norwegian University of Science and Technology, NTNU. Faculty of Medicine, Department of Neuroscience; 2009.
10.
go back to reference Jozefiak T, Larsson B, Wichstrøm L, Mattejat F, Ravens-Sieberer U. Quality of life as reported by school children and their parents: a cross-sectional survey. Health Qual Life Out. 2008;6:34.CrossRef Jozefiak T, Larsson B, Wichstrøm L, Mattejat F, Ravens-Sieberer U. Quality of life as reported by school children and their parents: a cross-sectional survey. Health Qual Life Out. 2008;6:34.CrossRef
11.
go back to reference Zwicker JG, Harris SR. Quality of life of formerly preterm and very low birth weight infants from preschool age to adulthood: a systematic review. Pediatrics. 2008;121(2):366–76.CrossRef Zwicker JG, Harris SR. Quality of life of formerly preterm and very low birth weight infants from preschool age to adulthood: a systematic review. Pediatrics. 2008;121(2):366–76.CrossRef
12.
go back to reference Saigal S, Rosenbaum PL, Feeny D, Burrows E, Furlong W, Stoskopf BL, et al. Parental perspectives of the health status and health-related quality of life of teen-aged children who were extremely low birth weight and term controls. Pediatrics. 2000;105:569–74.CrossRefPubMed Saigal S, Rosenbaum PL, Feeny D, Burrows E, Furlong W, Stoskopf BL, et al. Parental perspectives of the health status and health-related quality of life of teen-aged children who were extremely low birth weight and term controls. Pediatrics. 2000;105:569–74.CrossRefPubMed
13.
go back to reference Darlow BA, Horwood J, Pere-Bracken HM, Woodward LJ. Psychosocial outcomes of young adults born very low birth weight. Pediatrics. 2013;132:1521–8.CrossRef Darlow BA, Horwood J, Pere-Bracken HM, Woodward LJ. Psychosocial outcomes of young adults born very low birth weight. Pediatrics. 2013;132:1521–8.CrossRef
14.
go back to reference Strassburg HM, Leimer S, Platz A, Thomas W. Long-term prognosis of former very and extremely preterm babies in adulthood in Germany. Klin Padiatr. 2008;220(2):61–5.CrossRefPubMed Strassburg HM, Leimer S, Platz A, Thomas W. Long-term prognosis of former very and extremely preterm babies in adulthood in Germany. Klin Padiatr. 2008;220(2):61–5.CrossRefPubMed
15.
go back to reference Lund LK, Vik T, Lydersen S, Løhaugen GCC, Skranes J, Brubakk AM, et al. Mental health, quality of life and social relations in young adults born with low birth weight. Health Qual Life Out. 2012;10:146.CrossRef Lund LK, Vik T, Lydersen S, Løhaugen GCC, Skranes J, Brubakk AM, et al. Mental health, quality of life and social relations in young adults born with low birth weight. Health Qual Life Out. 2012;10:146.CrossRef
16.
go back to reference Kelly MM. Assessment of life after prematurity in 9- to 10-year old children. MCN. 2014;39(1):26–32. Kelly MM. Assessment of life after prematurity in 9- to 10-year old children. MCN. 2014;39(1):26–32.
17.
go back to reference Vederhus BJ, Markestad T, Eide GE, Graue M, Halvorsen T. Health-related quality of life after extremely preterm birth: a matched controlled cohort study. Health Qual Life Out. 2010;8:53.CrossRef Vederhus BJ, Markestad T, Eide GE, Graue M, Halvorsen T. Health-related quality of life after extremely preterm birth: a matched controlled cohort study. Health Qual Life Out. 2010;8:53.CrossRef
18.
go back to reference Van Lunenberg A, van der Pal SM, van Dommelen P, van der Pal – de Bruin KM, Gravenhorst JB, Verrips GHW. Changes in quality of life into adulthood after very preterm birth and/or very low birth weight in the Nederlands. Health Qual Life Out. 2013;11:51.CrossRef Van Lunenberg A, van der Pal SM, van Dommelen P, van der Pal – de Bruin KM, Gravenhorst JB, Verrips GHW. Changes in quality of life into adulthood after very preterm birth and/or very low birth weight in the Nederlands. Health Qual Life Out. 2013;11:51.CrossRef
19.
go back to reference Rauh VA, Nurcombe B, Achenbach T, Howell C. The mother-infant transaction program. The content and implications of an intervention for the mothers of low-birthweight infants. Clin Perinatol. 1990;17(1):31–45.PubMed Rauh VA, Nurcombe B, Achenbach T, Howell C. The mother-infant transaction program. The content and implications of an intervention for the mothers of low-birthweight infants. Clin Perinatol. 1990;17(1):31–45.PubMed
21.
go back to reference Sameroff AJ, Fiese B. Transactional Regulation: The Developmental Ecology of Early Intervention. In: Shonkoff J, Meisel S, editors. Handbook of Early Childhood Intervention. Cambridge: Cambridge University Press; 2000. p. 135–59.CrossRef Sameroff AJ, Fiese B. Transactional Regulation: The Developmental Ecology of Early Intervention. In: Shonkoff J, Meisel S, editors. Handbook of Early Childhood Intervention. Cambridge: Cambridge University Press; 2000. p. 135–59.CrossRef
22.
go back to reference Choe DE, Olson SL, Sameroff AJ. Effects of early maternal distress and parenting on the development of children’s self-regulation and externalizing behavior. Dev Psychopathol. 2013;25:437–53.CrossRefPubMed Choe DE, Olson SL, Sameroff AJ. Effects of early maternal distress and parenting on the development of children’s self-regulation and externalizing behavior. Dev Psychopathol. 2013;25:437–53.CrossRefPubMed
23.
go back to reference Tu MT, Gruneau RE, Petrie-Thomas J, Haley DW, Weinberg J, Whitfield MF. Maternal stress and behavior modulate relationships between neonatal stress, attention, and basal cortisol at 8 month in preterm infants. Dev Psychobiol. 2007;49(2):150–64.CrossRefPubMedCentralPubMed Tu MT, Gruneau RE, Petrie-Thomas J, Haley DW, Weinberg J, Whitfield MF. Maternal stress and behavior modulate relationships between neonatal stress, attention, and basal cortisol at 8 month in preterm infants. Dev Psychobiol. 2007;49(2):150–64.CrossRefPubMedCentralPubMed
24.
go back to reference Eiser C, Eiser JR, Mayhew AG, Gibson AT. Parenting the premature infant: balancing vulnerability and quality of life. J Child Psychol Psych. 2005;46:1169–77.CrossRef Eiser C, Eiser JR, Mayhew AG, Gibson AT. Parenting the premature infant: balancing vulnerability and quality of life. J Child Psychol Psych. 2005;46:1169–77.CrossRef
25.
go back to reference Lee CF, Hwang FM, Chen CJ, Chien LY. The interrelationships among parenting stress and quality of life of caregiver and preschool child with very low birth weight. Fam Community Health. 2009;32(3):228–37.CrossRefPubMed Lee CF, Hwang FM, Chen CJ, Chien LY. The interrelationships among parenting stress and quality of life of caregiver and preschool child with very low birth weight. Fam Community Health. 2009;32(3):228–37.CrossRefPubMed
26.
go back to reference Kaaresen PI, Rønning JA, Ulvund SE, Dahl LB. A randomized, controlled trial of the effectiveness of an early-intervention program in reducing parenting stress after preterm birth. Pediatrics. 2006;118(1):9–19.CrossRef Kaaresen PI, Rønning JA, Ulvund SE, Dahl LB. A randomized, controlled trial of the effectiveness of an early-intervention program in reducing parenting stress after preterm birth. Pediatrics. 2006;118(1):9–19.CrossRef
27.
go back to reference Landsem IP, Handegaard BH, Tunby J, Ulvund SE, Rønning JA. Early intervention program reduces stress in parents of pre-terms during childhood, a randomized controlled trial. Trials. 2014;15(1):387.CrossRefPubMedCentralPubMed Landsem IP, Handegaard BH, Tunby J, Ulvund SE, Rønning JA. Early intervention program reduces stress in parents of pre-terms during childhood, a randomized controlled trial. Trials. 2014;15(1):387.CrossRefPubMedCentralPubMed
28.
go back to reference Nordhov SM, Rønning JA, Dahl LB, Ulvund SE, Tunby J, Kaaresen PI. Early intervention improves cognitive outcomes for preterm infants: randomized controlled trial. Pediatrics. 2010;126(5):e1088–94.CrossRefPubMed Nordhov SM, Rønning JA, Dahl LB, Ulvund SE, Tunby J, Kaaresen PI. Early intervention improves cognitive outcomes for preterm infants: randomized controlled trial. Pediatrics. 2010;126(5):e1088–94.CrossRefPubMed
29.
go back to reference Nordhov SM, Rønning JA, Ulvund SE, Dahl LB, Kaaresen PI. Early intervention improves behavioral outcomes for preterm infants: randomized controlled trial. Pediatrics. 2012;129(1):e9–16.CrossRefPubMed Nordhov SM, Rønning JA, Ulvund SE, Dahl LB, Kaaresen PI. Early intervention improves behavioral outcomes for preterm infants: randomized controlled trial. Pediatrics. 2012;129(1):e9–16.CrossRefPubMed
30.
go back to reference Landsem IP, Handegaard BH, Tunby J, Ulvund SE, Kaaresen PI, Rønning JA: Does an early intervention influence behavioral development until age nine of children born prematurely? Accepted for publication in Child Dev 2014 Landsem IP, Handegaard BH, Tunby J, Ulvund SE, Kaaresen PI, Rønning JA: Does an early intervention influence behavioral development until age nine of children born prematurely? Accepted for publication in Child Dev 2014
31.
go back to reference Ravens-Sieberer U, Bullinger M: Manual for the KINDL-R Questionnaire for measuring health-related Quality of Life in children and adolescents – Revised Version. 2000 [http://www.kindl.org] Ravens-Sieberer U, Bullinger M: Manual for the KINDL-R Questionnaire for measuring health-related Quality of Life in children and adolescents – Revised Version. 2000 [http://​www.​kindl.​org]
32.
go back to reference Jardine J, Glinianaia SV, McConachie H, Embleton ND, Rankin J. Self-reported quality of life of young children with conditions from early infancy: a systematic review. Pediatrics. 2014;134:e1129.CrossRefPubMed Jardine J, Glinianaia SV, McConachie H, Embleton ND, Rankin J. Self-reported quality of life of young children with conditions from early infancy: a systematic review. Pediatrics. 2014;134:e1129.CrossRefPubMed
33.
go back to reference Renk K. Mothers’ perceptions of young children, parenting, and young children’s behavior problems. Child Fam Behav Ther. 2011;33(2):123–38.CrossRef Renk K. Mothers’ perceptions of young children, parenting, and young children’s behavior problems. Child Fam Behav Ther. 2011;33(2):123–38.CrossRef
34.
go back to reference Brazelton TB, Nugent K. The Neonatal Behavioral Assessment Scale. 3rd ed. London: MacKeith Press; 2011. Brazelton TB, Nugent K. The Neonatal Behavioral Assessment Scale. 3rd ed. London: MacKeith Press; 2011.
35.
go back to reference Ravens-Sieberer U, Gosch A, Abel T, Auquier P, Bellach B-M, Dur W, et al. Quality of life in children and adolescents: a European public health perspective. Social and Preventive Medicine. 2001;46:297–302.CrossRef Ravens-Sieberer U, Gosch A, Abel T, Auquier P, Bellach B-M, Dur W, et al. Quality of life in children and adolescents: a European public health perspective. Social and Preventive Medicine. 2001;46:297–302.CrossRef
36.
go back to reference Twisk JWR. Applied Multilevel Analysis. Cambridge: Cambridge University Press; 2006.CrossRef Twisk JWR. Applied Multilevel Analysis. Cambridge: Cambridge University Press; 2006.CrossRef
37.
go back to reference Alsawalmeh YM, Feldt LS. Test of the hypothesis that the intraclass reliabilitycoefficient is the same for two measurement procedures. Appl Psych Meas. 1992;16:195–205.CrossRef Alsawalmeh YM, Feldt LS. Test of the hypothesis that the intraclass reliabilitycoefficient is the same for two measurement procedures. Appl Psych Meas. 1992;16:195–205.CrossRef
38.
go back to reference Hedges LV, Olkin L. Statistical Methods for Meta-Analysis. Orlando, FL: Academic; 1985. Hedges LV, Olkin L. Statistical Methods for Meta-Analysis. Orlando, FL: Academic; 1985.
39.
go back to reference Kaaresen PI, Rønning JA, Tunby J, Nordhov SM, Ulvund SE, Dahl LB. A randomized controlled trial of an early intervention program in low birth weight children: outcome at 2 years. Early Hum Dev. 2008;84(3):201–9.CrossRefPubMed Kaaresen PI, Rønning JA, Tunby J, Nordhov SM, Ulvund SE, Dahl LB. A randomized controlled trial of an early intervention program in low birth weight children: outcome at 2 years. Early Hum Dev. 2008;84(3):201–9.CrossRefPubMed
40.
go back to reference Olafsen KS, Kaaresen PI, Handegard BH, Ulvund SE, Dahl LB, Rønning JA. Maternal ratings of infant regulatory competence from 6 to 12 months: influence of perceived stress, birth-weight, and intervention: a randomized controlled trial. Infant Behav Dev. 2008;31(3):408–21.CrossRefPubMed Olafsen KS, Kaaresen PI, Handegard BH, Ulvund SE, Dahl LB, Rønning JA. Maternal ratings of infant regulatory competence from 6 to 12 months: influence of perceived stress, birth-weight, and intervention: a randomized controlled trial. Infant Behav Dev. 2008;31(3):408–21.CrossRefPubMed
41.
go back to reference Olafsen KS, Rønning JA, Kaaresen PI, Ulvund SE, Handegard BH, Dahl LB. Joint attention in term and preterm infants at 12 months corrected age: the significance of gender and intervention based on a randomized controlled trial. Infant Behav Dev. 2006;29(4):554–63.CrossRefPubMed Olafsen KS, Rønning JA, Kaaresen PI, Ulvund SE, Handegard BH, Dahl LB. Joint attention in term and preterm infants at 12 months corrected age: the significance of gender and intervention based on a randomized controlled trial. Infant Behav Dev. 2006;29(4):554–63.CrossRefPubMed
42.
go back to reference Olafsen KS, Rønning JA, Dahl LB, Ulvund SE, Handegard BH, Kaaresen PI. Infant responsiveness and maternal confidence in the neonatal period. Scand J Psychol. 2007;48(6):499–509.CrossRefPubMed Olafsen KS, Rønning JA, Dahl LB, Ulvund SE, Handegard BH, Kaaresen PI. Infant responsiveness and maternal confidence in the neonatal period. Scand J Psychol. 2007;48(6):499–509.CrossRefPubMed
43.
go back to reference Gianino A, Tronick EZ. The Mutual Regulation Model: The infant’s Self- and Interactive Regulation and Coping and Defensive Capacities. In: Field YM, McCabe PM, Schneidermann N, editors. Stress and Coping Across Development. Hillsdale, New Jersey: Erlbaum; 1988. p. 47–68. Gianino A, Tronick EZ. The Mutual Regulation Model: The infant’s Self- and Interactive Regulation and Coping and Defensive Capacities. In: Field YM, McCabe PM, Schneidermann N, editors. Stress and Coping Across Development. Hillsdale, New Jersey: Erlbaum; 1988. p. 47–68.
44.
go back to reference Feldman R, Greenbaum CW, Yirmiya N. Mother-infant affect synchrony as an antecedent of the emergence of self-control. Dev Psychol. 1999;35(5):223–31.CrossRefPubMed Feldman R, Greenbaum CW, Yirmiya N. Mother-infant affect synchrony as an antecedent of the emergence of self-control. Dev Psychol. 1999;35(5):223–31.CrossRefPubMed
45.
go back to reference Feldman R. From biological rhytms to social rhythms: physiological precursors of mother-infant synchrony. Dev Psychol. 2006;42(1):175–88.CrossRefPubMed Feldman R. From biological rhytms to social rhythms: physiological precursors of mother-infant synchrony. Dev Psychol. 2006;42(1):175–88.CrossRefPubMed
46.
go back to reference Feldman R. The development of regulatory functions from birth to 5 years: Insights from premature infants. Child Dev. 2009;80(2):544–61.CrossRefPubMed Feldman R. The development of regulatory functions from birth to 5 years: Insights from premature infants. Child Dev. 2009;80(2):544–61.CrossRefPubMed
47.
go back to reference Hagekull B, Bohlin G. Predictors of middle childhood psychosomatic problems: an emotion regulation approach. Infant Child Dev. 2004;13:389–405.CrossRef Hagekull B, Bohlin G. Predictors of middle childhood psychosomatic problems: an emotion regulation approach. Infant Child Dev. 2004;13:389–405.CrossRef
48.
go back to reference Svedberg P, Eriksson M, Boman E. Associations between scores of psychosomatic health symptoms and health-related quality of life in children and adolescents. Health Qual Life Out. 2013;11:176.CrossRef Svedberg P, Eriksson M, Boman E. Associations between scores of psychosomatic health symptoms and health-related quality of life in children and adolescents. Health Qual Life Out. 2013;11:176.CrossRef
49.
go back to reference Østberg M, Hagekull B. Parenting stress and external stressors as predictors of maternal ratings of child adjustment. Scand J Psychol. 2013;54:213–21.CrossRefPubMed Østberg M, Hagekull B. Parenting stress and external stressors as predictors of maternal ratings of child adjustment. Scand J Psychol. 2013;54:213–21.CrossRefPubMed
50.
go back to reference Marques JCB, Oliveira JA, Goulardins JB, Nascimento RO, Lima AMV, Casella EB. Comparison of child self-reports and parent proxy-reports on quality of life of children with attention deficit hyperactivity disorder. Health Qual Life Out. 2013;11:186.CrossRef Marques JCB, Oliveira JA, Goulardins JB, Nascimento RO, Lima AMV, Casella EB. Comparison of child self-reports and parent proxy-reports on quality of life of children with attention deficit hyperactivity disorder. Health Qual Life Out. 2013;11:186.CrossRef
51.
go back to reference Morgan J, Robinson D, Aldridge J. Parenting stress and externalizing child behavior. Child Fam Soc Work. 2002;7:219–25.CrossRef Morgan J, Robinson D, Aldridge J. Parenting stress and externalizing child behavior. Child Fam Soc Work. 2002;7:219–25.CrossRef
52.
go back to reference Jozefiak T, Larsson B, Wichstrøm L, Wallander J, Mattejat F. Quality of life as reported by children and parents: a comparison between students and child psychiatric outpatients. Health Qual Life Out. 2010;8:136.CrossRef Jozefiak T, Larsson B, Wichstrøm L, Wallander J, Mattejat F. Quality of life as reported by children and parents: a comparison between students and child psychiatric outpatients. Health Qual Life Out. 2010;8:136.CrossRef
53.
go back to reference Hintz SR, Kendrick DE, Vohr BR, Poole WK, Higgins RD. Community supports after surviving extremely low-birth-weight, extremely preterm birth: special outpatient services in early childhood. Arch Pediatr Adolesc Med. 2008;162:748–55.CrossRefPubMedCentralPubMed Hintz SR, Kendrick DE, Vohr BR, Poole WK, Higgins RD. Community supports after surviving extremely low-birth-weight, extremely preterm birth: special outpatient services in early childhood. Arch Pediatr Adolesc Med. 2008;162:748–55.CrossRefPubMedCentralPubMed
54.
go back to reference Varni VW, Limbers CA, Burwinkle TM. How young can children reliably and validly self-report their health-related quality of life?: an analysis of 8,591 children across age subgroups with PedsQLTM 4.0 generic core scales. Health Qual Life Out. 2007;5:1.CrossRef Varni VW, Limbers CA, Burwinkle TM. How young can children reliably and validly self-report their health-related quality of life?: an analysis of 8,591 children across age subgroups with PedsQLTM 4.0 generic core scales. Health Qual Life Out. 2007;5:1.CrossRef
Metadata
Title
Early intervention influences positively quality of life as reported by prematurely born children at age nine and their parents; a randomized clinical trial
Authors
Inger Pauline Landsem
Bjørn Helge Handegård
Stein Erik Ulvund
Per Ivar Kaaresen
John A Rønning
Publication date
01-12-2015
Publisher
BioMed Central
Published in
Health and Quality of Life Outcomes / Issue 1/2015
Electronic ISSN: 1477-7525
DOI
https://doi.org/10.1186/s12955-015-0221-9

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