Table 4.

The association of quartiles polychlorinated dibenzo-p-dioxins concentration with all-cause mortality in NHANES 1999–2004.

PCDDs	Q1	Q2	Q3	Q4
1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin	Ref	1.16 (0.87, 1.53)	0.94 (0.70, 1.25)	1.22 (0.90, 1.66)
1,2,3,4,6,7,8-Heptachlororodibenzo-p-dioxin	Ref	0.79 (0.59, 1.06)	0.64 (0.47, 0.89)	0.55 (0.38, 0.80)
1,2,3,4,6,7,8,9-Octachlorodibenzo-p-dioxin	Ref	1.14 (0.85, 1.53)	1.21 (0.88, 1.66)	1.40 (0.99, 2.00)
1,2,3,4,6,7,8-Heptachlorodibenzofuran	Ref	1.11 (0.85, 1.43)	1.01 (0.76, 1.34)	1.08 (0.80, 1.47)
3,3′,4,4′,5-Pentachlorobiphenyl	Ref	1.09 (0.83, 1.41)	0.87 (0.67, 1.14)	0.88 (0.66, 1.17)

Q, quartile; PCDD, polychlorinated dibenzo-p-dioxin.

Adjusted as age, gender, PIR category, serum cotinine category, alcohol drink status, physical activity status, NHANES cycles, and all polychlorinated dibenzo-p-dioxins.