Odds ratios (OR) and 95% confidence interval (CI) for prevalent squamous dysplasia in the Cytology Sampling Study 2 cohort calculated in the multivariate model*
| Variable | OR | 95% CI | p Value† |
|---|---|---|---|
| *All of the ORs were calculated using the same multivariate model stratified on village of residence. | |||
| †p Values were from the likelihood ratio test for the addition of the listed variable to a model containing all other variables. All p values were from one degree of freedom (df) tests except tooth loss quintile (4 df). | |||
| ‡Household income and persons in household variables were strongly correlated (r2 = 0.53). If the model is refit using a ratio variable representing a 100 Yuan increase (approximately 1 SD) in per capita household income, then the OR (95% CI) is 0.84 (0.69, 1.03), p = 0.080, with very little change in the OR estimates for the other variables. | |||
| Age, 10 years | 1.03 | 0.99, 1.06 | 0.18 |
| Sex, male | 0.98 | 0.61, 1.58 | 0.94 |
| Smoker, ever | 1.35 | 0.80, 2.26 | 0.26 |
| Flushing, yes | 1.44 | 0.87, 2.36 | 0.16 |
| Persons in household, per 1 additional member‡ | 1.12 | 0.99, 1.25 | 0.061 |
| Household income, per 100 RMB increase‡ | 0.96 | 0.91, 1.00 | 0.055 |
| Family history of cancer, yes | 1.57 | 1.13, 2.18 | 0.0065 |
| Systolic blood pressure, per 10 mm Hg increase | 1.11 | 1.03, 1.19 | 0.0055 |
| Heating stove without chimney, yes | 2.22 | 1.27, 3.86 | 0.0052 |
| Tooth loss quintiles | |||
| Teeth quintile 1, <4 teeth lost | 1.0 | Referent | 0.047 |
| Teeth quintile 2, 4–6 teeth lost | 1.34 | 0.79, 2.23 | |
| Teeth quintile 3, 7–11 teeth lost | 1.36 | 0.79, 2.26 | |
| Teeth quintile 4, 12–31 teeth lost | 1.91 | 1.17, 3.15 | |
| Teeth quintile 5, edentulous | 0.96 | 0.53, 1.67 | |