Table 2.

Lymphocyte subset cell counts [mean ± standard deviation (std)] among formaldehyde (FA) exposed workers and unexposed controls.

	Controls†			FA exposed Workers†			P value††
	n	Mean	(std)	n	mean	(std)
CD3+CD4+
CD4 naïve (CD45RA+CCR7+)	41	301	131	32	261	140	0.14‡‡
CD4 memory (CD45RA−)
Central Memory (CD45RA-CCR7+)	41	198	80	32	208	74	0.88¥¥
Effector Memory (CD45RA-CCR7−)	41	229	82	32	212	105	0.09
T Regulation subset
CD4+CD25+	51	82	38	43	72	33	0.16
CD4+FoxP3+	51	50	22	43	41	18	0.04
CD25+FoxP3+	51	53	23	43	42	19	0.008
CD3+CD8+
CD8 naïve (CD45RA+CCR7+)	41	227	122	32	185	102	0.15¥
CD8 memory (CD45RA−)
Central Memory (CD45RA-CCR7+)	41	12	9	32	13	8	0.74¥¥
Effector Memory (CD45RA-CCR7−)	41	169	76	32	135	64	0.018

^†unadjusted mean (±SD) cells/μl blood;

^††P value compares exposed workers to controls, adjusted for age and sex;

^¥adjusted for age, sex, and smoking;

^‡‡adjusted for age, sex, and BMI;

^¥¥adjusted for age, sex, smoking, infection, BMI, and alcohol use.