Table I.

Baseline characteristics of PCGs and children randomized to MI group

	All PCGs	Smoker	Non-smokers
	N = 140	N = 99	N = 41
PCG characteristics	n (%)	n (%)	n (%)	P-value
Age in years
19–29	50 (35.7)	30 (30.3)	20 (48.8)	0.038*
>30	90 (64.3)	69 (69.7)	21 (51.2)
PCG is the mother of child?	133 (95.0)	93 (93.9)	40 (97.6)	0.371
Education (completed high school or above)	73 (52.1)	49 (49.5)	24 (58.5)	0.330
Marital status (married or domestic partner)	37 (26.4)	24 (24.2)	13 (31.7)	0.362
Race (PCG)
White	21 (15.0)	17 (17.2)	4 (9.8)
Black	81 (57.9)	60 (60.6)	21 (51.2)
Other	38 (27.1)	22 (22.2)	16 (39.0)	0.104
Other household member smokes?				0.001*
Yes	82 (58.6)	41 (41.4)	41 (100.0)
No	58 (41.4)	58 (58.6)	0 (0.0)
Home smoking ban	43 (30.9)	23 (23.5)	20 (48.8)	0.003*
Car smoking ban (/ number of families with cars)	28/93 (30.1)	14/61 (23.0)	14/32 (43.8)	0.038*
Total smoking ban [home ban + (car ban or no car)]	29 (20.9)	17 (17.2)	12 (29.3)	0.115
Where does PCG smoking occur?
Outside only		32 (32.3)
Outside and inside		51 (51.5)
Inside mostly		12 (12.1)
Low literacy (REALM < 61)	44 (32.4)	30 (31.6)	14 (34.1)	0.769
Child characteristics
Child age
Mean ± SD	6.88 ± 1.998	6.90 ± 2.03	6.83 ± 1.94	0.852
Child gender				0.980
Male	89 (63.6)	63 (63.6)	26 (63.4)
Female	51 (36.4)	36 (36.4)	15 (36.6)
Child saliva cotinine (ng/ml)
Mean ± SD	1.90 ± 1.93	2.10 ± 1.92	1.42 ± 1.87	0.057
Insurance (child)
Medicaid	109 (77.9)	80 (80.8)	29 (70.7)	0.191
Asthma severity
Mild	41 (29.3)	30 (30.3)	11 (26.8)	0.682
Mild persistent	2 (1.4)	2 (2.0)	0 (0.0)
Moderate persistent	77 (55.0)	52 (52.5)	25 (61.0)
Severe persistent	20 (14.3)	15 (15.2)	5 (12.2)

*P < 0.05.