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Table 1 Analysis of Change-on-Change Studies at different Time-points: comparison of univariate analyses at each time-point with a multivariate analysis allowing for correlation of outcomes at different time-points

From: The effects of step-count monitoring interventions on physical activity: systematic review and meta-analysis of community-based randomised controlled trials in adults

Follow-up Period Separate Meta-analysis at Time-point
Mean Difference [95% CI]
Multivariate Meta-analysis across Time-points
Mean Difference [95% CI]
≤ 4 months 1172 [815, 1528] 1126 [787, 1466]
Approximately 6 months 1156 [672, 1641] 1050 [602, 1498]
1 year 458 [277, 638] 464 [301, 626]
2 years 66 [−92, 224] 121 [−64, 306]
3–4 years 494 [251, 738] 434 [191, 676]
  1. Both Univariate and Multivariate models fitted using REML as MM option not available for multivariate model
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