Paraben Levels in an Urban Community of Western Canada

Table 4

Means, standard deviations, and ranges of urinary parabens in the 39 subjects. All paraben units are ng/mL.

Group	No. of patients	Statistic	Methyl paraben	Ethyl paraben	Propyl paraben	Butyl paraben	Isobutyl paraben
All patients	39	Mean	99.7	21.0	36.4	1.59	0.89
		Std dev.	184.7	35.0	109.1	4.04	1.91
		50% percentile	25.95	10.30	2.80	0.32	0.23
		Low	3.25	5.291	1.16	0.14	0.14
		High	966.46	220.6	612.73	22.9	9.7
All female patients	28	Mean	101.3	24.4	26.45	2.08	1.12
		Std dev.	197.4	40.9	63.1	4.7	2.22
		50% percentile	25.45	10.17	2.80	0.30	0.24
		Low	3.25	5.291	1.16	0.14	0.14
		High	966.46	220.63	297.94	22.9	9.7
Pregnant women	9	Mean	72.1	11.45	6.09	2.79	0.22
		Std dev.	129.3	6.67	11.11	7.54	0.130
		50% percentile	25.98	9.83	2.48	0.25	0.14
		Low	4.9	7.54	1.33	0.14	0.14
		High	409	29	35.7	22.9	0.54
Non pregnant women	19	Mean	115.2	30.28*	36.0	1.74	1.55
		Std dev.	224.6	48.7	75.0	2.75	2.61
		50% percentile	24.92	11.89	3.18	0.49	0.28
		Low	3.25	5.291	1.16	0.14	0.14
		High	966.46	220.63	297.9	10.92	9.7
Men	11	Mean	93.53	12.87	61.9	0.36	0.29
		Std dev.	155.9	6.01	182.0	0.254	0.181
		50% percentile	25.95	10.37	3.09	0.35	0.22
		Low	13.67	8.67	1.7	0.14	0.14
		High	534.62	29.23	612.73	1.0	0.74

∗Denotes that mean paraben value significantly different from male values (baseline) via a 𝑡-test.