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. 2019 Jan 10;7(1):e10071. doi: 10.2196/10071

Table 2.

Attrition by participant characteristics (n=38).

Characteristic All (n=38) Completers (n=24) Lost to follow-up (n=14) P value
Sex, n (%) .48

Female 27 (71) 18 (67) 9 (33)
Male 11 (29) 6 (55) 5 (46)
Race, n (%) .34

White 35 (92) 21 (60) 14 (40)
Asian 2 (5) 2 (100) 0 (0)
Black 1 (3) 1 (100) 0 (0)
Marital status, n (%) .28

Married 21 (55) 11 (52) 10 (48)
Divorced or widowed 11 (29) 8 (73) 3 (27)
Single 6 (16) 5 (83) 1 (17)
Education, n (%) .42

≤High school 9 (24) 4 (44) 5 (56)
Some college 12 (32) 9 (75) 3 (25)
College grad 17 (45) 11 (65) 6 (35)
Employment, n (%) .20

Employed 14 (37) 9 (64) 5 (36)
Retired 13 (34) 6 (46) 7 (54)
Unemployed or on leave 11 (29) 9 (82) 2 (18)
Income, n (%) .66

<US $10k 4 (11) 4 (100) 0 (0)
US $10k-$30k 4 (11) 2 (50) 2 (50)
US $30k-$70k 8 (21) 4 (50) 4 (50)
>US $70k 20 (53) 13 (65) 7 (35)
Missing 2 (5) 1 (50) 1 (50)
Baseline tablet use, n (%) <.01

Never or rarely or monthly 14 (37) 4 (29) 10 (71)
Occasionally or more 24 (63) 20 (83) 4 (17)
Baseline gameplay history, n (%) .85

Never or rarely or monthly 6 (16) 4 (67) 2 (33)
Occasionally or more 32 (84) 20 (63) 12 (38)
Smoking since diagnosis, n (%) .97

Maintained or increased 8 (21) 5 (63) 3 (38)
Decreased 30 (79) 19 (63) 11 (37)
Quit attempts of >24 hours in past year, n (%) .33

No 9 (24) 4 (44) 5 (56)
Yes, once 9 (24) 7 (78) 2 (22)
Yes, more than once 20 (53) 13 (65) 7 (35)
Cancer site, n (%) .62

Lung 12 (32) 7 (58) 5 (42)
Gastrointestinal 9 (24) 4 (44) 5 (56)
Gynecologic 6 (16) 5 (83) 1 (17)
Colorectal 5 (13) 4 (80) 1 (20)
Urologic 2 (5) 1 (50) 1 (50)
Other 4 (11) 3 (75) 1 (25)
Clinical stage, n (%) .46

0 3 (8) 1 (33) 2 (66.7)
I 14 (37) 8 (57) 6 (42.9)
II 7 (18) 5 (71) 2 (28.6)
III 6 (16) 3 (50) 3 (50.0)
IV 4 (11) 3 (75) 1 (25.0)
Missing (or 88 or 99) 4 (11) 4 (100) 0 (0)
Arm, n (%) .80

Standard Care 18 (47) 11 (61) 7 (39)
Quit It 20 (53) 13 (65) 7 (35)
Gameplay (n=20), n (%) .02

Any 8 (21) 8 (100) 0 (0)
None 30 (79) 16 (53) 14 (47)
Age (current; years), mean (SD) 57.11 (9.6) 54.79 (9.1) 61.07 (9.5) .05
Baseline Fagerstrom scorea, mean (SD) 3.68 (2.2) 3.41 (2.1) 4.17 (2.5) .35
Years smoking (n=40), mean (SD) 36.7 (12.6) 34.43 (14.1) 40.50 (8.8) .16
Baseline cigarettes per day (n=41), mean (SD) 12.34 (14.7) 11.10 (7.1) 14.46 (22.8) .50
Baseline intention to abstain for 30 days (n=40), mean (SD) 2.73 (2.1) 3.04 (2.3) 2.15 (1.8) .23
Baseline coping strategies, mean (SD) .57

Number used (of 13) 8.47 (3.8) 8.75 (4.2) 8.00 (3.2)
Baseline situational self-efficacy, mean (SD) .76

Mean (of 16 items), range 0-100 57.05 (22.6) 56.20 (24.2) 58.52 (20.2)

a0-2: Very low; 3-4: Low; 5: Medium; 6-7: High; 8-10: Very high or heavy.