Table 1.

Participant characteristics overall and examined separately among women assigned sequentially to the Incentives vs Best Practices treatment groups.

Characteristic	Overall (N = 60)	Incentives (N = 30)	Best Practices (N = 30)	p-value
Demographics
Age (years)	30.4 (5.2)	30.8 (5.0)	30.0 (5.4)	.54
Race/Ethnicity
% White	72	67	77	.39
Education
% < 12 years of education	7	3	10	.10
% = 12 years of education	53	67	40
% > 12 years of education	40	30	50
% Participating in WIC	47	53	40	.30
% Working for pay outside of home	40	27	53	.03
Smoking Characteristics
Cigarettes per day pre-pregnancy	18.6 (5.2)	19.0 (4.8)	18.2 (5.5)	.56
Cigarettes per day at intake	10.6 (6.2)	11.4 (6.0)	9.9 (6.5)	.36
Age first started smoking cigarettes	15.5 (3.1)	15.4 (3.3)	15.6 (3.0)	.82
% Living with another smoker	72	73	70	.77
% With no smoking allowed in home	73	70	77	.56
Cigarette Type	0	0	0	.07
% Light	0	0	0	.07
% Medium	13	3	23
% Full Flavor	17	17	17
% Contains Menthol	58	63	53	.43
% Tried quitting pre-pregnancy	69	72	67	.63
% Tried quitting during pregnancy	54	52	57	.70
Pregnancy Characteristics
Gestational age (weeks)	14.4 (4.6)	14.9 (4.9)	13.9 (4.3)	.41
Pregnancy Intention
% Now	13	17	10	.13
% Later	40	30	50
% Sooner	8	17	0
% Never	23	23	23
% Don’t know	15	13	17