. Author manuscript; available in PMC: 2015 Mar 1.

Published in final edited form as: Neurotoxicol Teratol. 2014 Feb 22;42:77–84. doi: 10.1016/j.ntt.2014.02.004

Table 1.

Frequency of self-reported MA use.^a

MA Use	N=101

	Trimester

	First	Second	Third

	N (%)	N (%)	N (%)
Daily	11 (10.9%)	5 (5.0%)	1 (1.0%)
3-6 days/wk.	16 (15.8%)	5 (5.0%)	6 (5.9%)
1-2 days/wk.	19 (18.8%)	17 (16.8%)	6 (5.9%)
1-3 days/mo.	12 (11.9%)	12 (11.9%)	11 (10.9%)
1-2 days/3 mos.	23 (22.8%)	10 (9.9%)	16 (15.8%)
Not at all	6 (5.9%)	48 (47.2%)	60 (59.4%)
Days/week (mean, SD)	2.18(2.35)	1.07(1.91)	0.46(1.17)

Used all 3 trimesters	34 (33.7%)

1 of the 103 MA users in this study denied MA use but was subsequently identified as exposed by the toxicology results, and 1 further participant did not provide self-report data for frequency but did report MA use7