Table 6.

Domestic tobacco smoke exposure.

Domestic tobacco smoke exposure	Visit
	1		2		3		4
	n	%	N	%	n	%	n	%
No	160	67.8	152	70.0	142	70.0	111	71.6
Yes	76	32.2	65	30.0	61	30.0	44	28.4
All	236	100	217	100	203	100	155	100