Evaluation of chemical-specific IgG antibodies in male workers from a urethane foam factory

Table 2 TDI- and TMA-specific IgG concentrations in urethane foam factory workers and controls

Geometric mean of IgG (95% CI) (μg/mL)
Controls				Urethane foam factory workers
Number for TDI (TMA)		TDI	TMA	Number	TDI	TMA	P value*
Median of IgG (range)		0.81 (ND–12.9)	1.77 (ND–36.8)		2.07 (ND–29.1)	2.58 (ND–74.6)	< 0.001 (TDI) 0.026 (TMA)
Age (years)
Below 39	23 (23)	1.22 (0.75, 1.98)	3.26 (2.09, 5.08)	44	1.69 (1.10, 2.59)	2.44 (1.46, 4.07)
40–49	23 (22)	1.41 (0.91, 2.18)	1.46 (0.64, 3.32)	19	1.91 (0.94, 3.86)	2.33 (1.07, 5.08)
50 and above	41 (40)	0.64 (0.35, 1.20)	1.92 (1.26, 2.93)	12	2.82 (1.47, 5.42)	2.41 (0.94, 6.19)
P value^#		0.033	0.173		0.341	0.451
Median (25 and 75 percentile)		37 (31, 47)			49 (39, 52)		< 0.001
Allergic history
No	49 (48)	1.19 (0.89, 1.61)	2.01 (1.39, 2.91)	50	1.95 (1.33, 2.85)	2.24 (1.36, 3.71)
Yes	38 (37)	0.75 (0.40, 1.42)	2.22 (1.29, 3.80)	25	1.79 (1.00, 3.20)	2.78 (1.64, 4.71)
P value^$		0.686	0.716		0.800	0.757
Smoking habit**
No	61 (60)	0.95 (0.70, 1.29)	1.83 (1.23, 2.71)	39	1.76 (1.09, 2.82)	2.12 (1.35, 3.34)
Yes	26 (25)	1.06 (0.46, 2.47)	2.90 (1.87, 4.49)	36	2.07 (1.38, 3.12)	2.75 (1.48, 5.12)
P value^#		0.496	0.195		0.668	0.311
Habitual alcohol drinking**
No	62 (61)	0.90 (0.58, 1.39)	2.15 (1.47, 3.14)	37	1.80 (1.05, 3.06)	3.24 (2.02, 5.20)
Yes	25 (24)	1.19 (0.83, 1.71)	1.99 (1.16, 3.43)	38	2.00 (1.41, 2.84)	1.82 (1.02, 3.24)
P value^$		0.262	0.577		0.678	0.145

ND not detected
^#P values were obtained using Kruskal–Wallis test
^$P values were obtained using Mann–Whitney U test
*P values were calculated for the comparison between controls and factory workers by Mann–Whitney U test
**P values were less than 0.05 in comparison of the prevalence of smokers and alcohol drinkers between controls and factory workers

ISSN: 1347-4715