Table 1.
Demographic characteristics, smoking habits, and plasma cotinine levels in study subjects.
| Characteristics | Values | N (%) | P | |
|---|---|---|---|---|
| N total | 88 | |||
| Origin | Nuevo leon | 65 (74) | ||
| Coahuila | 9 (10) | |||
| Others | 14 (16) | |||
| Gender | Female | 24 (27) | <0.0001* | |
| Male | 64 (73) | |||
| Smoking daily | Yes | 74 (84) | <0.0001* | |
| No | 14 (16) |
| Characteristics | Values | N (%) | Cotinine (ng/mL) Mean (standard error) | P |
|---|---|---|---|---|
| Number of cigarettes smoked in the last three days | 1–5 | 18 (20) | 25 (12.26) | 0.007** |
| 6–10 | 19 (22) | 78 (22) | ||
| 11–15 | 17 (19) | 63 (24) | ||
| 16–20 | 8 (9) | 139 (57) | ||
| >20 | 26 (30) | 131 (24) |
*P-value from Chi2 test
**P-value from ANOVA test