Estimation of Cutoff Values of Cotinine in Urine and Saliva for Pregnant Women in Poland

Table 4

Cotinine in saliva and urine classification based on self-reporting smoking status.

		𝑁	AM	SD	GM	95% CI
Nonsmoking
Saliva	Trimester I	50	5.99	6.88	4.437	4.376–4.498
	Trimester II	52	4.86	8.42	3.190	3.116–3.263
	Trimester III	52	3.86	4.14	3.060	3.024–3.096
Urine	Trimester II	52	10.78	29.31	4.497	4.242–4.751
	Trimester III	52	10.27	32.50	3.070	2.787–3.352
Urine corrected	Trimester II	52	14.33	35.61	5.531	5.221–5.841
	Trimester III	52	14.43	30.14	5.546	5.267–5.826
Smoking
Saliva	Trimester I	19	175.77	91.69	151.88	150.561–153.199
	Trimester II	17	174.42	98.67	141.92	140.424–143.425
	Trimester III	17	181.40	139.97	128.45	126.319–130.577
Urine	Trimester II	17	1021.97	632.79	747.67	738.044–757.292
	Trimester III	17	500.15	368.45	341.72	336.115–347.323
Urine corrected	Trimester II	17	1758.4	1703.8	1017.31	991.395–1043.22
	Trimester III	17	1133.2	1685.8	545.10	519.465–570.741