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Table 3 Teacher to NHANES and MGH referent median ratios

From: Serum PCB levels and congener profiles among teachers in PCB-containing schools: a pilot study

PCB Cong-ener 18 teacher median (ng/g serum) MGH referent median (ng/g serum) Ratio 18 teachers:MGH referent Teachers < 50 yrs median (ng/g serum) Ratio teachers < 50 yrs:MGH referents NHANES median subjects < 50 yrs old/ > 50 yrs (ng/g serum) RHAf
6 a 0.0017 0.0001 16.9931 0.0028 27.6006   0.001
8 a,e 0.0071 0.0001 71.1125 0.0067 67.2269   0.001
16 e 0.0038 0.00113 3.3367 0.0033 2.9499   0.005
18 e 0.0033 0.00198 1.6906 0.0025 1.2732   0.003
25 a 0.0012 0.0001 12.1379 0.0005 5   0.024
26 a 0.0008 0.0001 7.7850 0.0008 8   0.016
28 b,c,e 0.0222 0.00757 2.9357 0.0223 2.9417 0.031/0.030 0.12
31 e 0.0023 0.00048 4.7290 0.0017 3.5014   0.019
33 a,b,e 0.0185 0.0001 185.483 0.01600 159.663   0.011
37 a 0.0040 0.0001 40.4865 0.0025 25.2101   0.07
41 a 0.0016 0.0001 16.129 0.0009 8.7719   0.008
44 d,e 0.0034 0.00158 2.1274 0.0032 2.0416 0.013/0.012 0.009
47 a 0.0574 0.0068 8.4379 0.0836 12.2961   0.03
49 0.0031 0.00057 5.5081 0.0023 4.0800 0.008/0.007 0.01
52 c,e 0.0054 0.00254 2.1201 0.0048 1.8748 0.002/0.017 0.009
60 b, d 0.0029 0.0024 1.1942 0.0026 1.0776   0.06
66 b,d,e 0.0159 0.0042 3.7751 0.0106 2.5284 0.008/0.009 0.07
70 a,d,e 0.0070 0.00093 7.5341 0.0053 5.7094   0.05
74 b 0.0561 0.0331 1.6937 0.0364 1.1007 0.028/0.055 0.27
84 0.0009 0.00034 2.5577 0.0009 2.5355   0.04
87 a 0.0032 0.0001 31.7540 0.0031 30.9734 0.005/0.005 0.016
95 e 0.0089 0.0042 2.1207 0.0103 2.4565   0.01
97 a 0.0052 0.0001 52.1779 0.0047 46.5116   0.06
99 0.0444 0.0344 1.2923 0.0377 1.0959 0.024/0.036 0.28
101 e 0.0173 0.0046 3.7594 0.0133 2.89271 0.010/0.009 0.03
105 0.0142 0.007 2.0222 0.0082 1.1699 0.006/0.010 0.32
110 d 0.0081 0.0035 2.3041 0.0078 2.2167 0.007/0.007 0.014
118 0.0795 0.0595 1.3369 0.0613 1.0301 0.031/0.059 0.5
128 0.0029 0.0008 3.6754 0.0025 3.1512 0.001/0.001 0.3
135 0.0042 0.0015 2.7809 0.0043 2.8736   0.02
136 a 0.0043 0.0001 43.1323 0.00420 42.0168   0.008
138 0.1527 0.158 0.9666 0.0798 0.5053 0.097/0.178 0.6
141 0.0024 0.007 0.3456 0.0018 0.2506   0.06
146 0.0353 0.0215 1.6404 0.0189 0.8794 0.013/0.027 1.6
149 a 0.0133 0.00016 83.329 0.0142 88.4956 0.004/0.004 0.04
151 0.0073 0.0015 4.8602 0.0070 4.6784 0.002/0.002 0.03
153 0.2611 0.2016 1.2953 0.1561 0.7745 0.132/0.251 1.1
156 0.0407 0.0272 1.4973 0.0140 0.5156 0.022/0.044 2.3
157 0.0109 0.0084 1.2961 0.0061 0.7310 0.005/0.010 1.1
167 0.0121 0.0074 1.6395 0.0079 1.0669 0.004/0.009 1.2
170 0.0806 0.06 1.3430 0.0368 0.6140 0.042/0/081 2
171 0.0106 0.0061 1.7353 0.0059 0.9643   0.7
174 a 0.0078 0.0001 77.771 0.0071 70.7965   0.024
180 0.2278 0.142 1.6045 0.1067 0.7516 0.117/0.229 2.9
183 0.0280 0.0172 1.6255 0.0151 0.8788 0.010/0.019 0.5
187 0.0595 0.0445 1.3362 0.0293 0.6587 0.028/0.057 1.4
189 0.0036 0.0029 1.2403 0.0009 0.3025 0.001/0.001 2.6
194 0.0633 0.03 2.1090 0.0198 0.6583 0.026/0.056 3.1
195 0.0104 0.007 1.4849 0.0042 0.6002 0.006/0.012 1.1
196 0.0329 0.016 2.0590 0.0176 1.1029 0.022/0.042 0.8
199 0.0442 0.031 1.4271 0.0167 0.5376 0.023/0.053 0.04
203 0.0399 0.016 2.4930 0.0146 0.9159   1.8
206 0.0257 0.016 1.6070 0.0113 0.7090 0.014/0.032 2.1
209 0.0086 0.0067 1.2903 0.0043 0.6433 0.007/0.020 1.8
201/177 0.01210 0.0093 1.3007 0.0101 1.0843 0.008/0.016 2.9/1
  1. Legend: Superscripts refer to congeners that have been identified as markers of occupational or environmental, non-dietary PCB exposures. Congeners included in the NHANES data are in bold font.
  2. Congeners identified as markers of non-dietary exposure
  3. aHerrick, et al., 2007
  4. bLoutano, et al., 1991
  5. cKontas, et al., 2004
  6. dWingfors, et al., 2008
  7. eDeCaprio, et al., 2005
  8. fRelative Human Accumulation factors, Brown, 1992 (Ref 13)