|  | Low (<0.10 ng/ml) n(%) | Medium (0.10-0.50 ng/ml) n(%) | High (>0.50 ng/ml) n(%) | Total n |
---|---|---|---|---|---|
Neither parent smokes in home | 2007 | 549 (64.36) | 244 (28.60) | 60 (7.03) | 853 |
 | 2008 | 638 (70.03) | 198 (21.73) | 75 (8.23) | 911 |
Father figure smokes in home | 2007 | 28 (20.59) | 41 (30.15) | 67 (49.26) | 136 |
 | 2008 | 18 (13.64) | 47 (35.61) | 67 (50.76) | 132 |
Mother figure smokes in home | 2007 | 12 (8.39) | 31 (21.68) | 100 (69.93) | 143 |
 | 2008 | 12 (9.22) | 28 (19.86) | 100 (70.92) | 141 |
Both parents smoke in home | 2007 | 8 (3.76) | 19 (8.92) | 186 (87.32) | 213 |
 | 2008 | 7 (4.24) | 15 (9.09) | 143 (86.67) | 165 |