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Table 4 Geometric mean levels (and 95% confidence intervals) of blood biochemistry data by serum non dioxin like (NDL) PCB exposure groups (1 = lowest, 4 = highest)

From: Potential effects of polychlorinated biphenyls (PCBs) and selected organochlorine pesticides (OCPs) on immune cells and blood biochemistry measures: a cross-sectional assessment of the NHANES 2003-2004 data

Blood marker

n

Total non dioxin like (NDL) PCBs

1

2

3

4

Alanine aminotransferase ALT (U/L)

1897

22.2 (20.6, 23.8)

20.9 (19.9, 21.9)

23.1# (22.4, 23.8)

22.6# (21.6, 23.8)

Aspartate aminotransferase AST (U/L)

1897

23.6 (22.7, 24.5)

22.8 (22, 23.6)

23.9# (23.1, 24.7)

24.7# (24, 25.4)

Alkaline phosphotase (U/L)

1899

79.8 (76.1, 83.7)

66.7* (62.5, 71.2)

67.9* (65.3, 70.6)

71.4 (66.2, 76.9)

Bicarbonate (mmol/L)

1899

24.3 (23.9, 24.7)

24.8* (24.4, 25.1)

24.7* (24.5, 25)

24.8* (24.4, 25.1)

Iron (μmol/L)

1897

13.7 (13.2, 14.3)

14.2 (13.6, 14.7)

15*,# (14.6, 15.5)

14.6* (13.9, 15.3)

Lactate dehydrogenase LDH (U/L)

1897

129 (125, 133)

124* (121, 126)

124* (121, 128)

122* (119, 126)

Bilirubin, total (μmol/L)

1898

11.6 (10.9, 12.3)

12.8* (12.2, 13.5)

12.7* (12.1, 13.3)

12.6* (12.2, 13)

Uric acid (μmol/L)

1898

321 (308, 334)

309 (303, 315)

302* (294, 309)

298* (287, 308)

Creatinine (μmol/L)

1899

76 (74.1, 78)

76.4 (75.1, 77.7)

73.7# (72.4, 75.1)

70.7*,#,† (68.3, 73.1)

Sodium (mmol/L)

1898

139.3 (138.7, 139.9)

139.0* (138.4, 139.6)

139.3 (138.7, 139.9)

138.9 (138.2, 139.5)

Potassium (mmol/L)

1898

4.04 (4, 4.08)

4.01 (3.97, 4.06)

3.97*,# (3.93, 4.01)

3.9*,#,† (3.87, 3.94)

Chloride (mmol/L)

1899

103.9 (103.1, 104.7)

103.5 (102.8, 104.2)

103.7 (103.0, 104.4)

103.3† (102.6, 104)

Osmolality (mmol/kg)

1898

277.8 (276.5, 279.1)

276.7* (275.4, 278)

277.3 (276, 278.6)

276.7* (275.3, 278)

Globulin (g/L)

1898

29.4 (28.9, 30)

28.7* (28.1, 29.3)

28.4* (27.7, 29)

29.2 (28.3, 30)

  1. Comparisons are adjusted for age and gender. *p < 0.05 when compared to geometric mean of the first group; #p < 0.05 when compared to geometric mean of the second group; †p < 0.05 when compared to geometric mean of the third group.