Top

Knee Surgery, Sports Traumatology, Arthroscopy

Published in:

01-08-2017 | Knee

A non-response analysis of 2-year data in the Swedish Knee Ligament Register

Authors: John Reinholdsson, Jesper Kraus-Schmitz, Magnus Forssblad, Gunnar Edman, Martina Byttner, Anders Stålman

Published in: Knee Surgery, Sports Traumatology, Arthroscopy | Issue 8/2017

Abstract

Purpose

To analyse the non-response group in the Swedish Knee Ligament Register (SKLR).

Methods

All 3588 patients in the SKLR who had undergone anterior cruciate ligament surgery in 2010 were included. Respondents (n = 1865) and non-respondents (n = 1723) at the 2-year follow-up survey were assessed for potential differences in demographics and baseline data. KOOS/EQ5D questionnaires were sent to non-respondents together with a non-response survey asking questions about reasons for dropout.

Results

Respondents had a significantly higher mean age (27.8 years, range 9–64) than non-respondents (25.9 years, range 12–65) (p < 0.001). Women had a higher rate of response 927 (62.8 %) than men 938 (44.4 %) even after correction for age (p < 0.001). Alpine/telemark skiing was the only activity at time of injury that showed higher rate of respondents 280 (62.5 %) compared to non-respondents 168 (37.5 %) (p < 0.001). No differences in EQ5D at 2-year follow-up were found between the groups. The change in KOOS from 0 to 2 years showed difference in the subscale pain with 9.4 in the response group compared to 6.3 in the late-response group (p < 0.05) and the subscale quality of life with a difference of 26.1 and 22.6, respectively (p < 0.05). The non-response questionnaire showed shortcomings in patient information regarding the importance of the SKLR.

Conclusion

The register is valid concerning baseline surgical data, but higher age, female gender and perhaps higher socioeconomic status improve the response rates. KOOS showed small differences of questionable clinical significance. The SKLR patient information could be improved.

Level of evidence

Retrospective comparative study, Level III.

Ageberg E, Forssblad M, Herbertsson P, Roos EM (2010) Sex differences in patient-reported outcomes after anterior cruciate ligament reconstruction: data from the Swedish Knee Ligament Register. Am J Sports Med 38(7):1334–1342CrossRefPubMed

Barenius B, Forssblad M, Engström B, Eriksson K (2013) Functional recovery after anterior cruciate ligament reconstruction, a study of health-related quality of life based on the Swedish National Knee Ligament Register. Knee Surg Sports Traumatol Arthrosc 21(4):914–927CrossRefPubMed

Christensen AI, Ekholm O, Glumer C, Andreasen AH, Hvidberg MF, Kristensen PL, Larsen FB, Ortiz B, Juel K (2012) The Danish National Health Survey 2010. Study design and respondent characteristics. Scand J Public Health 40(4):391–397PubMed

Desai N, Bjornsson H, Samuelsson K, Karlsson J, Forssblad M (2014) Outcomes after ACL reconstruction with focus on older patients: results from The Swedish National Anterior Cruciate Ligament Register. Knee Surg Sports Traumatol Arthrosc 22(2):379–386CrossRefPubMed

Eaker S, Bergstrom R, Bergstrom A, Adami HO, Nyren O (1998) Response rate to mailed epidemiologic questionnaires: a population-based randomized trial of variations in design and mailing routines. Am J Epidemiol 147(1):74–82CrossRefPubMed

Ekholm O, Gundgaard J, Rasmussen NK, Hansen EH (2010) The effect of health, socio-economic position, and mode of data collection on non-response in health interview surveys. Scand J Public Health 38(7):699–706PubMed

Granan L-P, Forssblad M, Lind M, Engebretsen L (2009) The Scandinavian ACL registries 2004–2007: baseline epidemiology. Acta Orthop 80(5):563–567CrossRefPubMedPubMedCentral

Johnson TP, Wislar JS (2012) Response rates and nonresponse errors in surveys. JAMA 307(17):1805–1806CrossRefPubMed

Kantomaa MT, Tammelin TH, Nayha S, Taanila AM (2007) Adolescents’ physical activity in relation to family income and parents’ education. Prev Med 44(5):410–415CrossRefPubMed

10.

Kim J, Lonner JH, Nelson CL, Lotke PA (2004) Response bias: effect on outcomes evaluation by mail surveys after total knee arthroplasty. J Bone Joint Surg Am 86-A(1):15–21CrossRefPubMed

11.

Kotaniemi JT, Hassi J, Kataja M, Jonsson E, Laitinen LA, Sovijarvi AR, Lundback B (2001) Does non-responder bias have a significant effect on the results in a postal questionnaire study? Eur J Epidemiol 17(9):809–817CrossRefPubMed

12.

Murray DW, Britton AR, Bulstrode CJ (1997) Loss to follow-up matters. J Bone Joint Surg Br 79(2):254–257CrossRefPubMed

13.

Nordenvall R, Bahmanyar S, Adami J, Stenros C, Wredmark T, Felländer-Tsai L (2012) A population-based nationwide study of cruciate ligament injury in Sweden, 2001–2009: incidence, treatment, and sex differences. Am J Sports Med 40(8):1808–1813CrossRefPubMed

14.

Rahr-Wagner L, Thillemann TM, Lind MC, Pedersen AB (2013) Validation of 14,500 operated knees registered in the Danish Knee Ligament Reconstruction Register: registration completeness and validity of key variables. Clin Epidemiol 5:219–228CrossRefPubMedPubMedCentral

15.

Ronmark E, Lundqvist A, Lundback B, Nystrom L (1999) Non-responders to a postal questionnaire on respiratory symptoms and diseases. Eur J Epidemiol 15(3):293–299CrossRefPubMed

16.

Roos EM, Lohmander LS (2003) The Knee injury and Osteoarthritis Outcome Score (KOOS): from joint injury to osteoarthritis. Health Qual Life Outcomes 1:64CrossRefPubMedPubMedCentral

17.

Spindler KP, Wright RW (2008) Clinical practice. Anterior cruciate ligament tear. N Engl J Med 359(20):2135–2142CrossRefPubMedPubMedCentral

18.

Swedish Knee Ligament Register. Swedish national ACL database homepage. Accessed 12 July 2015

19.

Tammelin T, Nayha S, Hills AP, Jarvelin MR (2003) Adolescent participation in sports and adult physical activity. Am J Prev Med 24(1):22–28CrossRefPubMed

20.

Tolonen H, Helakorpi S, Talala K, Helasoja V, Martelin T, Prattala R (2006) 25-Year trends and socio-demographic differences in response rates: Finnish adult health behaviour survey. Eur J Epidemiol 21(6):409–415CrossRefPubMed

Title: A non-response analysis of 2-year data in the Swedish Knee Ligament Register
Authors: John Reinholdsson
Jesper Kraus-Schmitz
Magnus Forssblad
Gunnar Edman
Martina Byttner
Anders Stålman
Publication date: 01-08-2017
Publisher: Springer Berlin Heidelberg
Published in: Knee Surgery, Sports Traumatology, Arthroscopy / Issue 8/2017
Print ISSN: 0942-2056
Electronic ISSN: 1433-7347
DOI: https://doi.org/10.1007/s00167-015-3969-x

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

A non-response analysis of 2-year data in the Swedish Knee Ligament Register

Abstract

Purpose

Methods

Results

Conclusion

Level of evidence

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusion

Level of evidence

Please log in to get access to this content

Other articles of this Issue 8/2017

One-step surgery with multipotent stem cells and Hyaluronan-based scaffold for the treatment of full-thickness chondral defects of the knee in patients older than 45 years

Clinical usefulness of hindfoot assessment for total knee arthroplasty: persistent post-operative hindfoot pain and alignment in pre-existing severe knee deformity

Patient-specific instrumentation in total knee arthroplasty: simpler, faster and more accurate than standard instrumentation—a randomized controlled trial

Evaluation of pivot shift phenomenon while awake and under anaesthesia by different manoeuvres using triaxial accelerometer

Preserving the PCL during the tibial cut in total knee arthroplasty

Influence of age on clinical outcomes of three-dimensional transfer of the tibial tuberosity for patellar instability with patella alta