Table 3.
Agreement of self-reported smoking status with urine cotinine strip test result by Kappa value.
| Characteristics | n (%) | Agreement of self-reported smoker with Urine Cotinine strip test (%) | Agreement of self-reported Non-smoker with Urine Cotinine strip test (%) | Kappa value (95% CI) |
|---|---|---|---|---|
| Father's Occupation | ||||
| Professional | 105 (58.0) | 100.0 | 97.1 | 0.653 (0.29, 1.03) |
| Nonprofessional | 76 (42.0) | 87.5 | 97.1 | 0.801 (0.58, 1.00) |
| Father's Education Level | ||||
| High Education Level | 181 (64.0) | 81.8 | 95.3 | 0.614 (0.40, 0.83) |
| Low Education level | 102 (36.0) | 100.0 | 96.8 | 0.826 (0.64, 1.00) |
| Mother's Occupation | ||||
| Professional | 86 (59.7) | 100.0 | 97.6 | 0.491 (−0.11, 1.00) |
| Nonprofessional | 58 (40.3) | 75.0 | 96.3 | 0.639 (0.26, 1.00) |
| Mother's Education Level | ||||
| High Education Level | 167 (61.4) | 75.0 | 96.9 | 0.484 (0.13, 0.84) |
| Low education Level | 105 (38.6) | 92.3 | 95.7 | 0.800 (0.63, 0.97) |
| Family Financial Income | ||||
| High Income | 70 (28.3) | 100.0 | 94.2 | 0.317 (−0.16, 0.79) |
| Middle Income | 140 (56.7) | 90.9 | 99.2 | 0.901 (0.77, 1.00) 0.456 (0.03, 0.88) |
| Low Income | 37 (15.0) | 100.0 | 88.6 | |
| Father's smoking status | ||||
| Smoker | 119 (44.3) | 85.7 | 92.4 | 0.659 (0.47, 0.85) |
| Nonsmoker | 150 (55.7) | 100.0 | 97.9 | 0.847 (0.68, 1.00) |
| Mother's smoking status | 306 (100) | |||
| Smoker | – | – | – | |
| Nonsmoker | 92 | 96.8 | 0.788 (0.67, 0.91) | |
Kappa statistic, P < .001