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Table 4 Participation rates across experimental condition (stratified by baseline depressed status)

From: Application of the multiphase optimization strategy to a pilot study: an empirical example targeting obesity among children of low-income mothers

    1st call (N = 83/94) 2nd call (N = 64/79)  
Experimental condition Overall sample (N) No symptomsa
mean CESD (N = 62)
Symptoms
mean CESD (N = 45)
No symptoms completed Symptoms
completed
No symptoms completed Symptoms completed Overall completion
1 7 7.0 29.0 n/ab n/a n/a n/a n/a
2 7 6.0 29.7 4/4 (100%) 3/3 (100%) 4/4 (100%) 2/3 (67%) 13/14 (93%)
3 7 3.0 31.0 5/5 (100%) 2/2 (100%) 4/5 (80%) 2/2 (100%) 13/14 (93%)
4 6 2.5 26.0 1/3 (33%) 2/3 (67%) 3/3 (100%) 1/3 (33%) 7/12 (58%)
5 6 8.2 16.0 5/5 (100%) 1/1 (100%) 5/5 (100%) 1/1 (100%) 12/12 (100%)
6 6 7.7 36.0 2/3 (67%) 3/3 (100%) 2/3 (67%) 3/3 (100%) 10/12 (83%)
7 7 3.7 23.3 1/3 (33%) 4/4 (100%) n/a n/a 5/7 (71%)
8 6 5.3 19.5 3/3 (100%) 3/3 (100%) 3/3 (100%) 2/3 (67%) 11/12 (92%)
9 7 8.7 23.7 4/4 (100%) 3/3 (100%) 3/4 (75%) 3/3 (100%) 13/14 (93%)
10 7 8.3 27.8 3/3 (100%) 4/4 (100%) 3/3 (100%) 4/4 (100%) 14/14 (100%)
11 7 7.8 21.5 4/5 (80%) 2/2 (100%) n/a n/a 6/7 (86%)
12 7 8.7 29.3 2/3 (67%) 3/4 (75%) 2/3 (67%) 2/4 (50%) 9/14 (64%)
13 7 7.2 27.0 4/5 (80%) 2/2 (100%) n/a n/a 6/7 (86%)
14 6 5.0 38.5 n/a n/a 3/4 (75%) 1/2 (50%) 4/6 (67%)
15 7 6.8 22.0 5/5 (100%) 1/2 (50%) 4/5 (80%) 1/2 (50%) 11/14 (78%)
16 7 9.5 29.3 4/4 (100%) 3/3 (100%) 4/4 (100%) 2/3 (67%) 13/14 (93%)
Total N = 107 6.7 (3.6) 28.4 (11.2) 47/55 (85%) 36/39 (92%) 40/46 (87%) 24/33 (73%) 147/173 (85%)
  1. aNo depressive symptoms was calculated as CESD score <16 = No depressive symptoms; CESD ≥ 16 = Depressive symptoms (Center for Epidemiologic Studies on Depression) [23]
  2. bn/a = Not applicable due to randomization scheme