Table 5. Trends in prevalence and rate ratio for workplace SHS exposure from other people (everyday or sometimes) among employees according to characteristics (weighted results).
| 2002 | 2007 | 2012 | ||||
|---|---|---|---|---|---|---|
| Everyday or sometimes SHS exposure (%) | Rate ratioa (95% CI) | Everyday or sometimes SHS exposure (%) | Rate ratioa (95% CI) | Everyday or sometimes SHS exposure (%) | Rate ratioa (95% CI) | |
| Total | 78.2 | NA | 65.8 | NA | 52.0 | NA |
| Smoking status | ||||||
| Nonsmoker at the workplace | 72.9 | 1 (reference) | 56.4 | 1 (reference) | 42.2 | 1 (reference) |
| Smoker at the workplace | 86.3 | 1.09 (1.07, 1.12) | 83.8 | 1.30 (1.27, 1.34) | 78.7 | 1.60 (1.51, 1.70) |
| Sex | ||||||
| Men | 82.7 | 1 (reference) | 73.6 | 1 (reference) | 60.5 | 1 (reference) |
| Women | 70.7 | 0.96 (0.94, 0.98) | 54.5 | 0.91 (0.88, 0.94) | 41.6 | 0.82 (0.77, 0.88) |
| Age group | ||||||
| Less than 30 years | 79.8 | 1 (reference) | 67.1 | 1 (reference) | 61.7 | 1 (reference) |
| 30–39 years | 79.7 | 0.99 (0.96, 1.01) | 68.2 | 1.00 (0.98, 1.02) | 56.9 | 0.93 (0.87, 1.01) |
| 40–49 years | 78.2 | 0.98 (0.96, 1.00) | 64.6 | 0.92 (0.90, 0.95) | 47.9 | 0.81 (0.75, 0.88) |
| 50–59 years | 77.5 | 0.98 (0.95, 1.00) | 64.8 | 0.96 (0.94, 0.99) | 43.2 | 0.73 (0.66, 0.80) |
| 60 years or more | 62.6 | 0.87 (0.81, 0.93) | 59.0 | 0.86 (0.81, 0.92) | 46.7 | 0.80 (0.71, 0.91) |
| Employment category | ||||||
| Regular employee | 81.4 | 1.26 (1.21, 1.30) | 68.1 | 0.99 (0.96, 1.03) | 53.5 | 1.00 (0.93, 1.08) |
| Others, including part-time worker | 62.5 | 1 (reference) | 58.0 | 1 (reference) | 49.0 | 1 (reference) |
| Worksite scale (number of employees) | ||||||
| 10–29 | 78.2 | 1.07 (1.01, 1.12) | 69.9 | 1.10 (1.03, 1.18) | 57.2 | 1.29 (1.14, 1.46) |
| 30–49 | 84.0 | 1.12 (1.06, 1.18) | 67.5 | 1.05 (0.98, 1.13) | 60.9 | 1.36 (1.19, 1.55) |
| 50–99 | 78.2 | 1.09 (1.03, 1.15) | 66.8 | 1.11 (1.04, 1.19) | 51.4 | 1.18 (1.04, 1.35) |
| 100–299 | 77.4 | 1.08 (1.03, 1.15) | 64.6 | 1.08 (1.01, 1.16) | 49.9 | 1.13 (1.00, 1.28) |
| 300–999 | 73.8 | 1.08 (1.02, 1.14) | 52.9 | 0.96 (0.89, 1.04) | 39.9 | 0.91 (0.79, 1.05) |
| 1000 or more | 72.3 | 1 (reference) | 60.4 | 1 (reference) | 41.4 | 1 (reference) |
| Workplace smoking ban status | ||||||
| Complete ban | 34.2 | 1 (reference) | 30.3 | 1 (reference) | 37.3 | 1 (reference) |
| Partial ban | 76.5 | 2.19 (1.84, 2.60) | 66.5 | 2.02 (1.85, 2.22) | 56.9 | 1.49 (1.39, 1.59) |
| No ban | 84.2 | 2.38 (2.00, 2.83) | 81.1 | 2.28 (2.08, 2.50) | 71.5 | 1.71 (1.57, 1.86) |
CI, confidence interval; NA, not applicable; SHS, secondhand smoke
aAdjusted for all listed variables
Boldface indicates statistical significance (p <0.05).