Table 4 Univariate and multivariate logistic regression analysis between tobacco use and other factors with periodontitis
| Â | Periodontitis present | CORa | p value | AORb | 95% CI (L-U) | p value |
|---|---|---|---|---|---|---|
Age groups | ||||||
 20–35 | 47 (42.7%) | Constant | < 0.001 | Constant | ||
 35–44 | 80 (64.5%) | 2.43 | 1.98 | 1.12–3.49 | < 0.018 | |
 45–65 | 188 (91.3%) | 14.00 | 7.58 | 3.93–14.61 | < 0.001 | |
Gender | ||||||
 Female | 163 (64.2%) | Constant | < 0.001 | Constant | ||
 Male | 152 (81.7%) | 2.49 | 1.37 | 0.75–2.48 | NS | |
SES | ||||||
 Upper | 14 (87.5%) | 3.08 | 0.363 | – | ||
 Lower middle | 122 (73.5%) | 1.22 | ||||
 Lower | 179 (69.4%) | Constant | ||||
Brushing frequency | ||||||
 ≤ Once/day | 229 (73.4%) | Constant | 0.190 | Constant | ||
 ≥ Twice/day | 86 (67.2%) | 1.34 | 1.19 | 0.68–2.06 | NS | |
OHI-S | Â | |||||
 Good | 34 (50.7%) | Constant | < 0.001 | Constant | ||
 Fair | 133 (65.8%) | 1.87 | 1.01 | 0.50–2.01 | NS | |
 Poor | 148 (86.5%) | 6.24 | 1.86 | 0.77–4.51 | NS | |
Missing teeth | ||||||
 Absent | 134 (60.4%) | Constant | < 0.000 | Constant | ||
 Present | 181 (83.0%) | 3.21 | 2.02 | 1.21–3.38 | 0.007 | |
Smoking status | ||||||
 Absent | 232 (66.5%) | Constant |  < 0.001 | Constant | ||
 Present | 83 (91.2%) | 5.23 | 3.14 | 1.36–7.27 | 0.007 | |
Khaini | ||||||
 Absent | 226 (66.7%) | Constant | < 0.001 | Constant | ||
 Present | 89 (88.1%) | 3.70 | 2.27 | 1.12–4.61 | 0.023 | |
SLT chewers | ||||||
 Absent | 277 (71.2%) | Constant | 0.623 | – | ||
 Present | 38 (74.5%) | 1.18 | ||||
BMI | 24.6 + 2.6 | 1.23 | < 0.001 | 1.07 | 0.96–1.19 | NS |
PLI | 71.9 + 20.2 | 1.03 | < 0.001 | 1.01 | 1.00–1.02 | 0.004 |
BPI | 49.7 + 24.4 | 1.02 | < 0.001 | 1.00 | 0.99–1.02 | NS |