Table 1.
Sample characteristics: overall population and respondents to each survey modality
| Sample characteristic | Total (n =3247) n | % | Web (n =2619) % | Mail (n =628) % | χ2 (df ), p-value |
|---|---|---|---|---|---|
| Sex | |||||
| Male | 1709 | 52.8 | 55.5 | 41.3 | 40.5 (1) |
| Female | 1530 | 47.2 | 44.5 | 58.7 | <0.001 |
| Race | |||||
| White | 2220 | 85.2 | 85.1 | 85.3 | 0.2 (1) |
| Non-white | 386 | 14.8 | 14.9 | 14.7 | 0.899 |
| Living arrangement | |||||
| On-campus | 1678 | 52.0 | 56.5 | 33.1 | 110.3 (1) |
| Off-campus | 1548 | 48.0 | 43.5 | 66.9 | <0.001 |
| Fraternity/sorority membership | |||||
| Non-member | 2599 | 80.6 | 80.2 | 82.2 | 1.3 (1) |
| Member | 626 | 19.4 | 19.8 | 17.8 | 0.251 |
| Age (in years) | |||||
| Under 21 | 1759 | 54.2 | 58.4 | 37.1 | 96.1 (1) |
| 21–23 | 1314 | 40.6 | 37.3 | 54.3 | <0.001 |
| 24 or older | 167 | 5.2 | 4.3 | 8.7 | |
Chi-square tests indicate whether each sample characteristic differs significantly by survey modality.