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Table 7 Geometric mean levels (and 95% Confidence Intervals) of white blood cell and red blood cell counts by serum PCB 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

Data set used

n

White blood cell count (10 6 cells/mL) by total NDL PCB groups

1

2

3

4

All individuals

1899

7.46 (7.03, 7.91)

7.17 (6.83, 7.52)

6.78* (6.59, 6.98)

6.4*,#,† (6.23, 6.57)

Anemia removed

1754

7.42 (7.0, 7.86)

7.11 (6.81, 7.42)

6.843* (6.64, 7.05)

6.42*,#,† (6.17, 6.69)

Cancer removed

1729

7.38 (6.97, 7.82)

7.08 (6.79, 7.39)

6.86 (6.65, 7.07)

6.47*,#,† (6.22, 6.73)

T1D and RA removed

1820

7.44 (7.02, 7.88)

7.12 (6.82, 7.43)

6.84* (6.63, 7.05)

6.45*,#,† (6.22, 6.69)

Data set used

n

White blood cell count (10 6 cells/mL) by total DL PCB groups

1

2

3

4

All individuals

1935

7.36 (6.97, 7.78)

7.04 (6.77, 7.33)

6.95 (6.76, 7.15)

6.45*,#,† (6.2, 6.72)

Anemia removed

1786

7.39 (6.99, 7.81)

7.026 (6.78, 7.28)

6.92 (6.7, 7.16)

6.53*,#,† (6.29, 6.78)

Cancer removed

1763

7.44 (7.01, 7.89)

7.03 (6.79, 7.26)

6.92* (6.72, 7.13)

6.47*,#,† (6.18, 6.77)

T1D and RA removed

1853

7.41 (7.04, 7.80)

7.04 (6.78, 7.3)

6.96 (6.75, 7.18)

6.48*,#,† (6.23, 6.74)

Data set used

n

Red blood cell counts (10 9 cells/mL) by total DL PCB groups

 

1

2

3

4

All individuals

1935

4.77 (4.71, 4.84)

4.74 (4.69, 4.8)

4.76 (4.72, 4.79)

4.67*,† (4.62, 4.73)

Anemia removed

1786

4.78 (4.72, 4.85)

4.77 (4.71, 4.83)

4.78 (4.74, 4.82)

4.69† (4.64, 4.74)

Cancer removed

1763

4.79 (4.72, 4.85)

4.76 (4.71, 4.82)

4.78 (4.74, 4.81)

4.67*,#,† (4.61, 4.73)

T1D and RA removed

1853

4.77 (4.71, 4.84)

4.76 (4.70, 4.82)

4.77 (4.73, 4.80)

4.68† (4.62, 4.73)

  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.