Research output

Differential attrition in health behaviour change trials: A systematic review and meta-analysis

Research output: Contribution to journalArticleAcademicpeer-review

Standard

Differential attrition in health behaviour change trials: A systematic review and meta-analysis. / Crutzen, R.; Viechtbauer, W.; Spigt, M.; Kotz, D.

In: Psychology & Health, Vol. 30, No. 1, 02.01.2015, p. 122-134.

Research output: Contribution to journalArticleAcademicpeer-review

Harvard

APA

Vancouver

Author

Bibtex

@article{a38eb1a5a3344f33af2235df94b4a591,
title = "Differential attrition in health behaviour change trials: A systematic review and meta-analysis",
abstract = "AbstractObjective: Attrition is a common problem in health behaviour change (HBC) trials. When the degree of attrition differs between treatment conditions, then this is called differential attrition and is regarded as a major threat to internal validity. The primary research question of this study was: how often and to what degree does differential attrition occur in HBC trials?Design: A systematic review and meta-analysis of a random selection of HBC trials (k = 60). We meta-analysed the relative attrition rates using a random-effects model and examined the relationship between the relative attrition rates and the potential moderators: the amount of human contact in delivery and the intensity of the intervention/control condition, the type of control condition, and the follow-up intensity and duration.Main outcome measures: Relative attrition rates.Results: The average attrition rate was 18{\%} (SD = .15; M = .15) in the intervention and 17{\%} (SD = .13; M = .13) in the control conditions. The estimated average relative attrition rate was 1.10 (95{\%} CI: 1.01–1.20, p = .02), suggesting an overall higher attrition rate of 10{\%} in the intervention conditions. This relative attrition rate was not related to any of the potential moderators.Conclusion: There is indication of a slightly higher amount of attrition on average in the intervention conditions of HBC trials.",
keywords = "differential attrition, internal validity, health behaviour change, RCT, bias, RANDOMIZED CLINICAL-TRIALS, PUBLICATION BIAS, DROPOUT RATES, RISK, INTERVENTIONS, OUTCOMES, SMOKING, DESIGN, REACH, FILL",
author = "R. Crutzen and W. Viechtbauer and M. Spigt and D. Kotz",
year = "2015",
month = "1",
day = "2",
doi = "10.1080/08870446.2014.953526",
language = "English",
volume = "30",
pages = "122--134",
journal = "Psychology & Health",
issn = "0887-0446",
publisher = "TAYLOR & FRANCIS LTD",
number = "1",

}

RIS

TY - JOUR

T1 - Differential attrition in health behaviour change trials: A systematic review and meta-analysis

AU - Crutzen, R.

AU - Viechtbauer, W.

AU - Spigt, M.

AU - Kotz, D.

PY - 2015/1/2

Y1 - 2015/1/2

N2 - AbstractObjective: Attrition is a common problem in health behaviour change (HBC) trials. When the degree of attrition differs between treatment conditions, then this is called differential attrition and is regarded as a major threat to internal validity. The primary research question of this study was: how often and to what degree does differential attrition occur in HBC trials?Design: A systematic review and meta-analysis of a random selection of HBC trials (k = 60). We meta-analysed the relative attrition rates using a random-effects model and examined the relationship between the relative attrition rates and the potential moderators: the amount of human contact in delivery and the intensity of the intervention/control condition, the type of control condition, and the follow-up intensity and duration.Main outcome measures: Relative attrition rates.Results: The average attrition rate was 18% (SD = .15; M = .15) in the intervention and 17% (SD = .13; M = .13) in the control conditions. The estimated average relative attrition rate was 1.10 (95% CI: 1.01–1.20, p = .02), suggesting an overall higher attrition rate of 10% in the intervention conditions. This relative attrition rate was not related to any of the potential moderators.Conclusion: There is indication of a slightly higher amount of attrition on average in the intervention conditions of HBC trials.

AB - AbstractObjective: Attrition is a common problem in health behaviour change (HBC) trials. When the degree of attrition differs between treatment conditions, then this is called differential attrition and is regarded as a major threat to internal validity. The primary research question of this study was: how often and to what degree does differential attrition occur in HBC trials?Design: A systematic review and meta-analysis of a random selection of HBC trials (k = 60). We meta-analysed the relative attrition rates using a random-effects model and examined the relationship between the relative attrition rates and the potential moderators: the amount of human contact in delivery and the intensity of the intervention/control condition, the type of control condition, and the follow-up intensity and duration.Main outcome measures: Relative attrition rates.Results: The average attrition rate was 18% (SD = .15; M = .15) in the intervention and 17% (SD = .13; M = .13) in the control conditions. The estimated average relative attrition rate was 1.10 (95% CI: 1.01–1.20, p = .02), suggesting an overall higher attrition rate of 10% in the intervention conditions. This relative attrition rate was not related to any of the potential moderators.Conclusion: There is indication of a slightly higher amount of attrition on average in the intervention conditions of HBC trials.

KW - differential attrition

KW - internal validity

KW - health behaviour change

KW - RCT

KW - bias

KW - RANDOMIZED CLINICAL-TRIALS

KW - PUBLICATION BIAS

KW - DROPOUT RATES

KW - RISK

KW - INTERVENTIONS

KW - OUTCOMES

KW - SMOKING

KW - DESIGN

KW - REACH

KW - FILL

U2 - 10.1080/08870446.2014.953526

DO - 10.1080/08870446.2014.953526

M3 - Article

VL - 30

SP - 122

EP - 134

JO - Psychology & Health

T2 - Psychology & Health

JF - Psychology & Health

SN - 0887-0446

IS - 1

ER -