Sample size | Selected centiles (95% CI) | ||||
---|---|---|---|---|---|
50th | 75th | 90th | 95th | ||
*<LOD (less than the limit of detection: 0.05 ng/ml). | |||||
Total | 5866 | <LOD* | 0.10 (0.08 to 0.11) | 0.31 (0.27 to 0.39) | 0.67 (0.60 to 1.84) |
Smoke-free law coverage category | |||||
No law | 4026 | <LOD | 0.12 (0.10 to 0.13) | 0.37 (0.32 to 0.47) | 0.78 (0.70 to 1.92) |
Limited | 503 | <LOD | 0.09 (0.04 to 0.13) | 0.24 (0.14 to 0.37) | 0.53 (0.28 to 1.62) |
Extensive | 1337 | <LOD | <LOD | 0.07 (0.03 to 0.12) | 0.16 (0.11 to 1.49) |