Table 4.

Summary of all post-exposure and only end-of-day urine HDA levels^a, adjusted for creatinine concentration, stratified twice by workplace and individual factors. The HDA levels were first stratified into the two levels of variable A. Then, they were stratified again into the two levels of variable B.^b

					Post-exposure urine (μg HDA/g creatinine)			End-of-day urine (μg HDA/g creatinine
Variable A	Level A	Variable B	Level B	N	GM	GSD	p-value	GM	GSD	p-value
Respirator	PAPR/air supply	Coverall	no	4	0.08	5.56	0.77	0.08	5.59	0.78
			yes	22	0.07	3.65		0.07	4.57
	Cartridge	Coverall	no	33	0.17	3.22	0.10	0.14	4.95	0.31
			yes	55	0.10	5.40		0.09	5.99
Respirator	PAPR/air supply	Gloves	no	3	0.09	3.46	0.74	0.09	4.34	0.67
			yes	23	0.07	3.98		0.07	4.77
	Cartridge	Gloves	no	21	0.16	3.56	0.44	0.13	5.35	0.52
			yes	67	0.12	4.96		0.10	5.72
Respirator	PAPR/air supply	Current	no	20	0.05	4.12	0.03	0.05	4.71	0.16
		smoker	yes	6	0.16	2.08		0.15	3.55
	Cartridge	Current	no	57	0.12	4.93	0.47	0.10	5.95	0.44
		smoker	yes	31	0.15	4.05		0.13	5.04
Coverall	no	Current	no	21	0.17	3.17	0.65	0.14	4.30	0.74
		smoker	yes	17	0.14	3.84		0.15	4.19
	yes	Current	no	57	0.08	5.23	0.06	0.06	5.90	0.10
		smoker	yes	20	0.16	3.62		6.41	6.46

^aPost-exposure urine level includes all urine samples collected from a painter after at least one exposure had occurred while the end-of-day urine level was measured in the last urine sample of the workday.

^bN = number of urine samples; GM = geometric mean; GSD = geometric standard deviation.