Skip to main content

Table 3 Summary of multinomial logistic regression analysis for study completion status: late/early dropout versus completion

From: 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

  

Early dropouts (before week 4)

Late dropouts (after week 4)

 

Variable

Number

Odds ratio (95 % CI)

Number

Odds ratio (95 % CI)

 

Trial arma

 Intervention

9

0.78 (0.29; 2.10)

10

1.43 (0.50; 4.39)

Recruitment

Recruitment avenueb

 Stop Smoking Services

6

0.79 (0.26; 2.39)

5

0.84 (0.26; 2.77)

 Community

1

0.66 (0.07; 6.42)

1

0.84 (0.08; 8.33)

Recruitment methodc

 Telephone

9

1.63 (0.58; 4.62)

10

3.32 (1.05; 10.60)

 Community

1

0.86 (0.87; 8.58)

1

1.58 (0.15; 16.61)

Demographics

Age (years)

21

0.94 (0.90; 0.99)

17

1.00 (0.95; 1.05)

Genderd

 Female

13

1.48 (0.53; 5.05)

11

1.67 (0.54; 5.05)

Body mass index

21

1.02 (0.95; 1.11)

17

0.99 (0.33; 1.08)

Employment statuse

 Unemployed

7

0.63 (0.22; 1.79)

11

2.32 (0.76; 7.03)

Job statusf

 C2-E

13

2.77 (0.30; 25.53)

4

0.43 (0.06; 2.92)

 Unemployed

7

1.55 (0.16; 15.18)

11

1.22 (0.21; 7.03)

Age left education

21

1.04 (0.82; 1.31)

17

0.64 (0.36; 1.14)

Smoking history

Years smoking

 

0.95 (0.90; 0.99)

 

1.16 (0.97; 1.06)

Previous use of Stop Smoking Servicesg

 No

14

01.49 (0.53; 4.22)

9

0.84 (0.28; 2.46)

Smoking-related variables

Cigarettes per day

21

0.82 (0.94; 1.03)

17

1.01 (0.97; 1.04)

Expired air carbon monoxide (parts per million)

21

1.01 (0.95; 1.08)

16

1.07 (1.00; 1.14)

Fagerstrom Test for Nicotine Dependence

21

1.01 (0.86; 1.42)

17

1.31 (0.98; 1.73)

Importance of quitting in the next 6 months (median)h

 High 6–7

11

1.21 (0.45; 3.29)

9

1.24 (0.42; 3.63)

Confidence to quit in the next 6 months (median)i

 High 4–7

12

0.55 (0.20; 1.51)

10

0.31 (0.95; 0.98)

Confidence to cut down by half in the next month (median)j

 High 5–7

3

1.95 (0.71; 5.31)

2

0.97 (0.31; 2.97)

Physical activity- related variables

Self-reported ≥30 mins of moderate and vigorous physical activity per dayk

 Yes

11

0.42 (0.15; 1.19)

10

0.55 (0.18; 1.68)

Self-reported minutes of moderate and vigorous physical activity per day

21

1.00 (0.99; 1.00)

17

0.99 (0.98; 1.00)

Self-reported ≥30 mins of moderate and vigorous physical activity on at least 5 daysl

 Yes

9

0.89 (0.33; 2.41)

6

0.64 (0.21; 1.95)

Self-reported ≥150 mins of moderate and vigorous physical activity per weekm

 Yes

11

0.30 (0.10; 0.85)

10

0.39 (0.12; 1.21)

Accelerometer ≥30 mins of moderate and vigorous physical activity per dayn

 Yes

8

0.81 (0.27; 2.46)

6

2.23 (0.48; 10.18)

Accelerometer total minutes of moderate and vigorous physical activity per day

19

1.00 (0.97; 1.02)

9

0.54 (0.99; 1.04)

Stage of change to use physical activity to control smokingo

 Planning, action, maintenance

2

0.32 (0.07; 1.55)

3

0.66 (0.17; 2.61)

Confidence to exercise for ≥30 mins on most days over next 6 monthsp

 High (6–7)

12

0.99 (0.36; 2.69)

8

0.66 (0.23; 1.93)

Confidence to walk for ≥15 mins at a brisk paceq

 High (7)

12

0.46 (0.34; 2.53)

11

1.27 (0.41; 3.90)

Indicated mental health problemr

 Yes

11

1.82 (0.67; 4.95)

7

1.16 (0.39; 3.46)

  1. aReference: control; bReference: primary care; cReference: letter only; dReference: male; eReference: employed; fReference: social class A-C1; gReference: have used SSS in the past; hReference: low importance; iReference: low confidence; jReference: low confidence; kReference: not reporting 30 mins MVPA per day; lReference: not completing 30 mins MVPA on at least 5 days per week; mReference: not reporting >150 mins MVPA per week; nReference: not completing 30 mins MVPA per day as assessed by accelerometer; oReference: pre-contemplation and contemplation; pReference: low confidence; qReference: low confidence; rReference group: no indicated mental health problem
Back to article page

Trials

ISSN: 1745-6215