Nicotine and cotinine in mothers' and infants' hair

Table 4: Maternal hair concentrations of nicotine

Group Mean hair concentration, ng nicotine/mg hair Standard deviation Standard error Range

Active smokers
Mother only smoker in household
Mother and others in household smoke
Total
17.13
21.71
19.21 20.45
36.25
28.33 4.82
9.36
4.93 0.63-70.4
0.3-131.5
0.3-131.5

Passive smokers 3.32 3.98 0.85 0.17-12.59

Nonsmokers 1.24 2.27 0.39 0-10.08

Table 4: Maternal hair concentrations of nicotine
Group	Mean hair concentration, ng nicotine/mg hair	Standard deviation	Standard error	Range
Active smokers Mother only smoker in household Mother and others in household smoke Total	17.13 21.71 19.21	20.45 36.25 28.33	4.82 9.36 4.93	0.63-70.4 0.3-131.5 0.3-131.5
Passive smokers	3.32	3.98	0.85	0.17-12.59
Nonsmokers	1.24	2.27	0.39	0-10.08