Nicotine and cotinine in mothers' and infants' hair

Table 5: Maternal hair concentrations of cotinine

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

Active smokers
Mother only smoker in household
Mother and others in household smoke
Total
2.28
12.18
6.30 6.42
34.77
22.72 1.47
9.64
4.02 0.12-28.65
0.09-127.40
0.09-127.40

Passive smokers 0.94 1.22 0.26 0.16-4.60

Nonsmokers 0.28 0.33 0.06 0-1.85

Table 5: Maternal hair concentrations of cotinine
Group	Mean hair concentration, ng cotinine/mg hair	Standard deviation	Standard error	Range
Active smokers Mother only smoker in household Mother and others in household smoke Total	2.28 12.18 6.30	6.42 34.77 22.72	1.47 9.64 4.02	0.12-28.65 0.09-127.40 0.09-127.40
Passive smokers	0.94	1.22	0.26	0.16-4.60
Nonsmokers	0.28	0.33	0.06	0-1.85