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. 2013 May 1;15(5):e77. doi: 10.2196/jmir.2385

Table 3.

Associations between recruitment source and use of Decide2Quit.org.

Demographic characteristic Unadjusted Adjusted

IRR (95% CI) Countsa (95% CI) IRR (95% CI) Countsa (95% CI)
Patient origin




From Google advertisement Reference 17.4 (15.3-19.6) Reference 17.0 (15.0-19.1)

From medical provider 0.7 (0.6-0.9) 12.9 (11.5-14.2) 0.8 (0.7-0.9) 12.7 (11.4-14.0)

From dental provider 0.7 (0.6-0.9) 12.3 (10.4-14.2) 0.7 (0.6-0.9) 12.0 (10.1-13.8)
Sex




Female Reference 15.3 (13.9-16.6) Reference 14.8 (13.6-16.1)

Male 0.8 (0.7-0.9) 12.3 (10.8-13.8) 0.8 (0.7-1.0) 12.1 (10.7-13.5)
Age




19-34 Reference 14.5 (12.7-16.9) Reference 14.3 (12.0-16.6)

35-54 1.0 (0.8-1.2) 13.8 (12.4-15.2) 0.9 (0.8-1.1) 13.4 (12.1-14.7)

> 55 1.0 (0.82-1.25) 14.7 (12.8-16.7) 1.0 (0.8-1.2) 14.3 (12.5-16.1)
Race




White Reference 11.7 (9.3-14.1) Reference 11.5 (9.2-13.9)

Nonwhite 1.3 (1.0-1.6) 14.6(13.5-15.7) 1.2 (1.0-0.5) 14.2 (13.1-15.2)
School




College graduate Reference 18.4 (15.8-21.1) Reference 17.8 (15.3-20.4)

< College graduate 0.7 (0.6-0.8) 13.0 (11.9-14.0) 0.7 (0.6-0.9) 12.8 (11.8-13.8)
Smoking status




Already quit Reference 16.2(13.3-19.1) Reference 15.9 (13.1-18.7)

Set a quit date 0.9 (0.7-1.2) 15.1 (12.0-18.3) 1.0 (0.8-1.3) 14.9 (11.9-17.9)

Thinking of quitting 0.9 (0.7-1.1) 13.9 (12.7-15.1) 0.9 (0.8-1.1) 13.5 (12.4-14.6)

Not thinking about quitting 0.6 (0.4-0.9) 9.9 (6.4-13.4) 0.7 (0.5-1.0) 10.1 (6.6-13.5)

aCounts are marginal predicted counts products postregression using the X command in STATA.