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Table 6 Concentrations of PAH metabolites stratified by possible sources of PAH (μg/g Cr)

From: Maternal urinary 2-hydroxynaphthalene and birth outcomes in Taiyuan, China

Variables 2-OH NAP 2-OH FLU 9-OH PHE 1-OH PYR
Passive smoking
 Yes 7.38 (6.10, 8.67) 4.14 (3.59, 4.69) 3.36 (2.84, 3.87) 2.02 (1.73, 2.32)
 No 7.24 (6.39, 8.08) 4.20 (3.70, 4.70) 3.63 (3.15, 4.11) 2.44 (2.10, 2.77)
 p 0.770 0.679 0.792 0.435
Distance from arterial traffic
 < 35 m 8.56 (7.05,10.06) 4.44 (3.68, 5.21) 4.01 (3.29, 4.74) 2.53 (2.07, 2.99)
 ≥ 35 m 6.53 (5.94, 7.12) 4.04 (3.66, 4.42) 3.24 (2.87, 3.61) 2.10 (1.82, 2.37)
 p 0.041 0.768 0.095 0.035
Heating type
 Collective 7.54 (6.71, 8.38) 4.07 (3.61, 4.53) 3.51 (3.07, 3.96) 2.21 (1.91, 2.51)
 Self-provided 6.68 (5.46, 7.90) 4.51 (3.89, 5.14) 3.60 (3.05, 4.14) 2.52 (2.15, 2.90)
 P 0.239 0.086 0.366 0.019
Cooking during pregnant period
 Yes 7.54 (6.37, 8.71) 3.86 (3.39, 4.33) 3.25 (2.82, 3.68) 2.08 (1.73, 2.42)
 No 7.25 (6.38, 8.11) 4.48 (3.91, 5.06) 3.79 (3.23, 4.35) 2.46 (2.12, 2.81)
 P 0.526 0.275 0.499 0.222
  1. The table presents the mean and 95% confidence interval. The bold presented a p-value less than 0.05