Table 3.
Logistic regression analysis with moderate/severe periodontitis as dependent variable.
| Variables * | Categories | ORcrd | 95%CI | P value † | ORadj ‡ | 95%CI | P value † |
|---|---|---|---|---|---|---|---|
| Gender | Male | 1 | 1 | ||||
| Female | 0.58 | 0.33, 1.02 | 0.059 | 0.81 | 0.42, 1.56 | 0.520 | |
| Age, years | <65 | 1 | 1 | ||||
| ≥65 | 2.30 | 1.49, 3.54 | <0.001 | 1.59 | 0.96, 2.64 | 0.070 | |
| BMI | <18.5 | 1 | 1 | ||||
| 18.5 to 22.9 | 1.26 | 0.66, 2.40 | 0.492 | 1.19 | 0.58, 2.48 | 0.634 | |
| ≥23.0 | 1.91 | 0.95, 3.82 | 0.068 | 1.60 | 0.73, 3.50 | 0.245 | |
| Presence of hypertension | No | 1 | 1 | ||||
| Yes | 2.46 | 1.39, 4.36 | 0.002 | 1.99 | 1.07, 3.71 | 0.030 | |
| Smoking | Never | 1 | 1 | ||||
| Former | 5.01 | 1.50, 16.70 | 0.009 | 5.63 | 1.56, 20.32 | 0.008 | |
| Current | 5.64 | 0.73, 43.88 | 0.098 | 6.81 | 0.82, 56.74 | 0.076 | |
| Number of teeth present | 0.89 | 0.84, 0.93 | <0.001 | 0.89 | 0.85, 0.95 | <0.001 | |
| PCR (%) | <20 | 1 | 1 | ||||
| ≥20 | 1.79 | 1.15, 2.80 | 0.011 | 1.88 | 1.15, 3.07 | 0.011 | |
| Duration of maintenance phase | 1.06 | 1.02, 1.10 | 0.002 | 1.07 | 1.03, 1.11 | 0.001 |
ORcrd, unadjusted odds ratio; ORadj, adjusted odds ratio; CI, confidence interval; BMI, body mass index; PCR, plaque control record. P values were considered statistically significant if less than 0.05. * Variables were selected according to P value less than 0.20 with the chi-square test or unpaired t-test in Table 2 and considering previous studies; † Wald test; ‡ Odds ratio adjusted by gender, age, BMI, hypertension, smoking, number of teeth present, PCR, and duration of maintenance phase. According to the Hosmer and Lemeshow test, chi-square statistic was 5.424 (p = 0.711).