Figure 1.
Odds of participant contact by telephone at one month. Using generalised estimating equations (GEE) modelling with Week 4 as reference, the odds of a successful contact at Weeks 1, 2, and 3 were, respectively, 1.52 (95% CI = [1.18,1.96]), 1.30 (95% CI = [1.01, 1.66]), and 1.37 (95% CI = [1.07, 1.76]).
