Table 2.

Measure of MSDP across samples, percentage of mothers who reported smoking, and percentage of mothers who reported smoking heavily (Level 3) during pregnancy

Sample	Levels of the MSDP measure	% of MSDP*	% of heavy MSDP*
TEDS	1 = no cigarettes	18.9% (N = 2595)	5.5% (N = 755)
	2 = 10 or < cigarettes per day
	3 = 11+ cigarettes per day
NTR	1 = no cigarettes	18.9% (N = 2942)	2.6% (N = 404)
	2 = <10 cigarettes per day (or pipe)
	3 = 10+ cigarettes per day
FT12	1 = no cigarettes	11.4% (N = 303)	3.6% (N = 95)
	2 = <10 cigarettes per day
	3 = 10+ cigarettes per day
CATSS	1 = no cigarettes	11.5% (N = 1558)	3.9% (N = 526)
	2 = <10 cigarettes per day
	3 = 10+ cigarettes per day

Note: MSDP = maternal smoking during pregnancy; * = out of the total N.