Mean cotinine concentrations in non-smokers with smoking partners as a percentage of cotinine concentrations in cigarette smokers
| Base smokers | Base non-smokers | Arithmetic mean (95% CI) | Geometric mean (95% CI) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Cigarette smokers | Non-smokers with smoking spouse | Non-smokers as % of smokers | Cigarette smokers | Non-smokers with smoking spouse | Non-smokers as % of smokers | ||||||
| 1994 | 2755 | 631 | 245.6 (240.2 to 251.0) | 1.66 (1.53 to 1.82) | 0.68 | 167.5 (159.7 to 175.7) | 0.97 (0.89 to 1.06) | 0.58 | |||
| 1996 | 3270 | 779 | 242.0 (237.0 to 246.9) | 1.68 (1.55 to 1.79) | 0.69 | 158.0 (150.6 to 165.8) | 1.06 (0.98 to 1.14) | 0.67 | |||
| 1994 and 1996 combined | 6025 | 1410 | 243.6 (240.0 to 247.3) | 1.67 (1.58 to 1.77) | 0.69 | 162.3 (156.9 to 167.9) | 1.02 (0.96 to 1.08) | 0.63 | |||