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. 1999 May 29;318(7196):1456–1459. doi: 10.1136/bmj.318.7196.1456

Table 2.

Changes in reported levels of parental smoking at follow up. Values are numbers (percentages) unless stated otherwise

Variable Intervention group (n=213) Control group (n=222) χ2 for trend* P value
Reported difference in total amount smoked by index parent
Smokes less 59 (28) 55 (25)
Smokes same amount 96 (45) 120 (54) 0.21 0.65
Smokes more 58 (27) 47 (21)
Reported difference in amount smoked in home by index parent
Smokes less 104 (49) 84 (38)
Smokes same amount 47 (22) 65 (29) 3.25 0.07
Smokes more 62 (29) 73 (33)
Reported difference in smoking in same room as child
Smokes less 59 (28) 49 (22)
Smokes same amount 131 (61) 139 (63) 3.05 0.08
Smokes more 23 (11) 34 (15)
*

df=1. Includes parents who have stopped smoking (7 intervention, 5 control).