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Table 3 Quitting attempts among the intervention and control subjects (% calculated as a fraction of all subjects in the given subgroup)

From: Smoking cessation intervention during pregnancy in a Polish urban community – what is the target population?

Variable Intervention Control
  N n % N n %
All groups 152 120 78.9* 145 58 40.0
Education
Primary or vocational 125 95 76.0* 110 35 31.8
College or university 27 25 92.6* 35 23 65.7
Number of cigarettes/day smoked before the attempt
< 5 10 10 100 13 11 84.6
5–10 65 53 81.5* 82 35 42.7
>10 77 57 74.0* 50 12 24.0
Fagerström test
0–6 138 111 80.4* 143 58 40.6
7–9 14 9 64.3 2 0 0
Smoking in previous pregnancies
Primigravidas 76 67 88.2* 58 31 53.4
Yes 68 45 66.2* 74 19 25.7
No 8 8 100 13 8 61.5
Smoking husband
Yes 130 100 76.9* 111 38 34.2
No 22 20 90.9* 34 20 58.8
  1. * statistically significant (p < 0.05) difference in distributions of groups intervention and control.