Table 1.

Demographic, smoking history, and Web site utilization characteristics of study sample

	Responders (n=385)	Nonresponders (n=931)	Bounced (n=185)
Age (years)	37.3±11.2	34.3±10.6***	35.2±10.9*
Gender (female)	70.9%	63.2%**	61.6%*
Ethnicity (White)	91.4%	82.9%**	83.5%**
Education (some college or more)	85.2%	79.5%	74.6%**
Stage of change (action)	39.2%	24.6%***	23.2%***
Cigarettes per day	21.24±9.6	20.08±11.4	21.57±12.8
Total time online (min)	540.55±1883.4	157.81±805.01***	94.2±254.77***
Web site use (1×only)	30.7%	52.0%***	57.5%***
Last login (number of days)	45.9±42.4	76.6±36.1***	76.6±33.5***

Note. Between-group differences were analyzed using t test (means) and chi-square (proportions). Nonresponders and bounced were each compared to responders.

^*p<.05;

^**p<.01;

^***p<.001.