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. 2017 Oct 9;5(10):e142. doi: 10.2196/mhealth.7900

Table 1.

Baseline characteristics from registration profile responses for all users who completed a profile; study participants and nonparticipants. Test results are for null hypotheses of no mean difference between participants and nonparticipants.

Profile characteristics All users (N=247) Participants (n=151) Nonparticipants (n=96) P value

Mean (SDa) or n (%) Mean (SD) or n (%) Mean (SD) or n (%)
Gender: female, n (%) 243 (98) 151 (100) 92 (96) .02b
Smoked in previous 30 days, n (%) 237 (96) 151 (100) 86 (90) <.001b
Set quit date at baseline, n (%) 198 (80) 127 (84) 71 (74) .07b
Cigarettes smoked on a typical day, mean (SD) 16.1 (10.6) 16.6 (11.9) 15.2 (8.1) .27c
Amount paid for a pack of cigarettes in US $, mean (SD) 6.61 (2.80) 6.70 (2.77) 6.47 (2.86) .54c
Referred to SMSFd bye, n (%)




Facebook 29 (12) 19 (13) 10 (10) .69b

Google or Google Play Store 78 (32) 56 (37) 22 (23) .02b

Friend or family 26 (11) 14 (9) 12 (13) .52b

Other 135 (55) 79 (52) 56 (58) .36b

aSD: standard deviation.

bFisher exact test.

ct test (2-tailed).

dSMSF: See Me Smoke-Free.

eTotals may exceed 100%, as users could provide more than one response.