Table 4.

Effectiveness of quitting attempts by social variables (% calculated as a fraction of all subjects with quitting attempts in given subgroup)

Variable	Intervention			Control
	N	n	%	N	n	%
All groups	120	70	58.3	58	34	58.6
Education
Primary or vocational	95	52	54.7	35	19	54.3
College or university	25	18	72.0	23	15	65.2
Number of cigarettes/day smoked before the attempt
< 5	10	9	90.0	11	5	45.5
5–10	53	35	66.0	35	22	62.9
>10	57	26	45.6	12	7	58.3
Fagerström test
0–4	111	63	56.8	58	34	58.6
7–9	9	7	77.8	0	0	-
Smoking in previous pregnancies
Primigravidas	67	43	64.2	31	20	64.5
Yes	45	20	44.4	19	7	36.8
No	8	7	87.5	8	7	87.5
Smoking husband
Yes	100	58	58.0	38	20	52.6
No	20	12	60.0	20	14	70.0