Factors associated with study attrition in a pilot randomised controlled trial to explore the role of exercise-assisted reduction to stop (EARS) smoking in disadvantaged groups

Table 4 Multivariable multinomial logistic regression for study completion status: late/early dropout versus completion (N = 97)

	Early dropouts (before week 4)		Late dropouts (after week 4)
Variable	Number	Odds ratio (95 % CI)	Number	Odds ratio (95 % CI)
Self-reported ≥150 minutes of moderate and vigorous physical activity per week^m
Yes	11	0.23 (0.07; 0.75)	10	0.52 (0.14; 1.90)
Confidence to quit in the next 6 months (median)ⁱ
High (4–7)	9	0.50 (0.16; 1.51)	5	0.37 (0.11; 1.27)
Recruitment method^c
Telephone	9	1.25 (0.39; 4.01)	10	2.77 (0.79; 9.78)
Community	1	0.51 (0.42; 6.17)	1	1.72 (0.14; 21.33)
Age (years)	21	1.00 (0.85; 1.17)	17	0.84 (0.65; 1.06)
Years smoking	21	0.94 (0.81; 1.09)	17	1.21 (0.95; 1.54)

^aReference: not reporting >150 minutes MVPA per week; ^bReference: low confidence; ^cReference: letter only

ISSN: 1745-6215