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Table 2 Retention at each time point in the randomized controlled trial and days to completion

From: The marketing plan and outcome indicators for recruiting and retaining parents in the HomeStyles randomized controlled trial

Time point

All participants

Experimental group

Control group

n (%)

Total experimental n (%)

Active partici-pantsa

n (%)

Days to next time point

Mean ± SD

Passive partici-pants

n (%)

Days to next time point

Mean ± SD

Total control

n (%)

Active partici-pantsa

n (%)

Days to next time point

Mean ± SD

Passive partici-pants

n (%)

Days to next time point

Mean ± SD

Baseline survey

489 (100)

252 (100)

140 (55.56)

189.14 ± 138.72

112 (44.44)

402.76 ± 130.9b

237 (100)

124 (52.32)

169.15 ± 123.6

113 (47.68)

380.42 ± 113.75c

Mid-point survey

264 (53.99)

140 (55.56)

126 (90)

197.36 ± 108.93

14 (10)

336.86 ± 95.66b

124 (52.32)

102 (82.26)

163.64 ± 94.91

22 (17.74)

309.89 ± 19.99c

Post survey

172 (35.17)

89 (35.32)

86 (96.63)

43.46 ± 33.36

3 (3.34)

140.33 ± 43.16b

83 (35.02)

80 (96.39)

45.53 ± 36.95

3 (3.61)

95.67 ± 25.11c

Follow-Up survey

141 (28.83)

70 (27.78)

70 (100)

55.43 ± 63.10

0 (0)

0 (0)

71 (29.96)

71 (100)

51.16 ± 40.44

0 (0)

 

Long-term follow-up survey

124 (25.36)

61 (24.21)

--

--

--

--

63 (26.58)

--

--

--

--

  1. aActive participants were defined as retrieving 3 of 4 possible guides on their own from the website whereas Passive participants were defined as retrieving less than 3 of 4 possible guides on their own from the website between the following time points: baseline and mid-point survey; mid-point and post survey. At all other time points, participants were defined as Active if they retrieved 1 of 1 possible guide on their own and Passive if they did not retrieve a guide on their own from the website
  2. bIndependent t-tests and Mann Whitney U tests indicate significant (p ≤ 0.05) differences of active and passive participant days to next survey point in the experimental group
  3. cIndependent t-tests and Mann Whitney U tests indicate significant (p ≤ 0.05) differences of active and passive participant days to next survey point in the control group