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. Author manuscript; available in PMC: 2012 May 1.
Published in final edited form as: Chemosphere. 2011 Apr 1;83(10):1374–1382. doi: 10.1016/j.chemosphere.2011.02.071

Table 3.

Organochlorines and specific PCB congener levels in >50% of Akwesasne Mohawk young adults: Breastfed vs. non-breastfed (in ppb)*.

Non-Breastfed (n=76) Breastfed (n=73)
Mean GM Max Mean GM SD Max t p
ΣTotal PCBsa,b 0.81 0.78 2.64 0.94 0.87 0.516 4.34 –2.10 0.04
Σ14PCB50%a,c 0.43 0.40 1.32 0.52 0.47 0.329 2.50 –2.32 0.02
Σ9 Persistent PCBsa,d 0.31 0.29 1.09 0.41 0.35 0.286 1.91 –2.77 <0.01
Σ5 Non-persistent PCBsa,e 0.12 0.11 0.26 0.11 0.10 0.070 0.59 0.83 0.41
p,p’ -DDEa 0.35 0.32 0.93 0.42 0.33 0.295 1.61 –0.40 0.69
HCBa 0.04 0.03 0.09 0.04 0.03 0.017 0.11 –1.12 0.27
PCB IUPAC#
118 0.05 0.04 0.42 0.05 0.04 0.027 0.181 0.17 0.87
138 [+163+164]f 0.06 0.05 0.21 0.08 0.07 0.062 0.41 –2.77 <0.01
153 0.06 0.06 0.21 0.09 0.08 0.071 0.45 –3.52 <0.01
101[+90]f 0.03 0.03 0.08 0.03 0.02 0.018 0.12 1.57 0.12
99 0.04 0.04 0.13 0.04 0.03 0.033 0.22 0.72 0.47
87 0.02 0.02 0.06 0.02 0.02 0.010 0.07 0.16 0.87
52 0.03 0.02 0.09 0.03 0.03 0.021 0.15 –2.26 0.03
74 0.01 0.01 0.06 0.03 0.02 0.035 0.25 –3.01 <0.01
105 0.02 0.01 0.10 0.02 0.02 0.020 0.08 –1.72 0.09
187 0.02 0.01 0.07 0.03 0.01 0.026 0.18 –2.06 0.04
110 0.03 0.02 0.10 0.03 0.02 0.023 0.14 1.36 0.18
180 0.03 0.02 0.09 0.05 0.03 0.069 0.38 –3.35 <0.01
95 0.01 0.01 0.17 0.01 0.00 0.015 0.11 1.66 0.10
28 0.01 0.01 0.05 0.01 0.01 0.009 0.03 0.89 0.38
*

3 participants did not report breast feeding status.

Abbreviations: PCB, polychlorinated biphenyls; PPB, parts per billion; IUPAC, International Union of Pure and Applied Chemistry; GM, geometric mean; SD, standard deviation; MAX, maximum level detected in sample.

a

Values below the detection limit have been replaced by the value midway between the detection limit and zero.

b

ΣTotal PCBs: Sum of all PCB congeners tested

c

Σ14PCB50%: Sum of IUPAC#s 28,52,74,87,95,99,101 [+90],105,110,118,138[+163+164],153,180,187

d

Σ9 Persistent PCBs: Sum of IUPAC#s 28,74,99,105,118,138[+163+164],153,180,187

e

Σ5 Non-persistent PCBs: Sum of IUPAC#s 52,87,95,101 [+90],110

f

Bracket indicates minor coeluting congener(s) based on Aroclor compositions and expected persistence (Brown, 1994; Hansen, 1998)