Cotinine: creatinine ratio (CCR) by self reported smoking status (equivalent to Lee’s table 2)
| Non-smoker n (%) | Subtotal* | Never-smoker n (%) | Ex-smoker n (%) | Current smoker n (%) | Subtotal* | Total | |
|---|---|---|---|---|---|---|---|
| *Subtotals of non-smoker and current smoker divided at 100 ng/mg CCR level. | |||||||
| CCR (ng/mg) | |||||||
| 0 | 84 (26.4) | 78(27.3) | 6(18.8) | 1(1.3) | |||
| 2– | 29 (9.1) | 23(8.0) | 6(18.8) | 1(1.3) | |||
| 10– | 95 (29.9) | 86(30.1) | 9(28.1) | 2(2.6) | |||
| 25– | 64 (20.1) | 61(21.3) | 3(9.4) | 1(1.3) | |||
| 50– | 18 (5.7) | 290 | 16(5.6) | 2(6.3) | 3(3.8) | 8 | 298 |
| 100– | 3(0.9) | 3(1.0) | 0(0.0) | 4(5.1) | |||
| 250– | 2(0.6) | 1(0.3) | 1(3.1) | 9(11.5) | |||
| 500– | 6(1.9) | 4(1.4) | 2(6.3) | 9(11.5) | |||
| 1000– | 9(2.8) | 8(2.8) | 1(3.1) | 18(23.1) | |||
| 2000– | 8(2.5) | 28 | 6(2.1) | 2(6.3) | 30(38.5) | 70 | 98 |
| Total | 318 (100.0) | 286(100.0) | 32(100.0) | 78(100.0) | 396 | ||
| Median CCR (ng/mg) | 17.4 | 17.4 | 13.6 | 1482.8 | |||
| Median cotinine (ng/ml) | 14.3 | 14 | 16.5 | 1681.8 | |||
| Median creatinine (mg/ml) | 0.91 | 0.91 | 1.06 | 1.05 | |||