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. 2015 Apr 23;36(8):852–857. doi: 10.1093/carcin/bgv055

Table 1.

Characteristics of formaldehyde-exposed factory workers and non-exposed controls in Guangdong, China

Characteristic Exposed (N = 43) Control (N = 51) P value
Age, years (Mean ± SD) 31.3±5.9 29.6±7.0 0.25
Sex (%)
 Male 37 (86.0) 44 (86.3) 1.00
 Female 6 (14.0) 7 (13.7)
Current smoking status (%)
 No 25 (58.1) 28 (54.9) 0.84
 Yes 18 (41.9) 23 (45.1)
Current alcohol consumption (%)
 No 32 (74.4) 30 (58.8) 0.13
 Yes 11 (25.6) 21 (41.2)
Recent infections (%)
 No 26 (60.5) 36 (70.6) 0.38
 Yes 17 (39.5) 15 (29.4)
Recent use of medication (%)
 No 17 (58.6) 16 (64.0) 0.78
 Yes 12 (41.4) 9 (36.0)
BMI, kg/m2 (Mean ± SD) 21.5±2.5 22.2±3.2 0.37
FA exposure, ppm (Median (IQR) [min, 10th, 90th percentile, max]) 1.28 (1.1) [0.32, 0.65, 2.47, 5.61] 0.026 (0.012) [0.015, 0.015, 0.026, 0.026] NA

BMI, body mass index; FA, formaldehyde; SD, standard deviation.

a P values were obtained from Fisher’s exact test for categorical variables and Wilcoxon rank sum test for continuous variables.