Table 2 Prevalence ratio for periodontitis.
From: Relationship between long working hours and periodontitis among the Korean workers
Prevalence ratio (95% confidence interval) | |||
|---|---|---|---|
Periodontitis | By Community Periodontal Index (CPI) | ||
CPI 3 | CPI 4 | ||
Long working hours | 1.19 (1.14–1.24) | 1.20 (1.13–1.27) | 1.28 (1.15–1.42) |
By Weekly work hours (hours) | |||
40< and ≤52 | 1.08 (1.02–1.14) | 1.09 (1.02–1.17) | 1.08 (0.95–1.23) |
>52 | 1.29 (1.23–1.37) | 1.31 (1.23–1.39) | 1.46 (1.30–1.65) |
