Table 1 Analysis of attrition comparing retained participants with complete data (n = 1214) and lost participants with complete data (n = 2255) at cycle 1 of data collection

4.50 (0.51)

4.47 (0.47)

2.50

0.114

1.51 (1.90)

1.75 (1.96)

11.30

<0.001

0.77 (1.42)

0.81 (1.23)

0.67

0.414

4.86 (3.47)

4.91 (3.31)

0.17

0.676

1.97 (2.19)

2.24 (2.13)

11.34

<0 .001

14.68 (2.86)

14.40 (2.72)

7.42

0.007

8.80 (3.68)

9.14 (3.62)

6.57

0.010

14.60 (3.51)

14.61 (3.32)

0.01

0.918

3.43 (1.05)

4.41 (0.93)

0.23

0.629