Table 1: Summary of published case-control study populations examining risk of NHL and PCB blood content including those meta-analyzed in the present study. Summed or total PCB metrics shown here.

Study (notes, conc values)PercentilePCB conc (ng/g lipid)Min concMax concCase sample sizeControl sample sizeOR95% LCL95% UCLMeta-analysis inclusion

Rothman et al. 1997 (mean conc) [40]Total74147
152624764110371.00
272764980613371.300.53.3No
3924814106021372.801.17.6
414301070207030364.501.712.0

Engel et al., 2007 (Janus cohort, median conc) [41]Total190190
11048.344481.00
21398.348471.100.72.0Yes
31674.938481.000.51.9
42148.260471.700.83.4

Engel et al., 2007 (CLUE 1 cohort median conc) [41]Total74147
1551.410371.00
272613371.100.72.0Yes
3911.521371.000.51.9
41377.330361.700.83.4

Spinelli et al., 2007 (Median conc) [42]Total403
1<100.9100.9811151.00
2>100.9155.61031141.410.932.14Yes
3>155.6220771151.110.711.74
4>22065711421152.141.383.30

De Roos et al., 2005 [26]Total9796
1<6.46.428241.00
2>6.48.6916250.590.251.40Yes
3>8.6913.1720230.860.381.98
4>13.1733241.510.623.67

Laden et al., 2010 (median conc) [48]Total145290
1406.933721.00
2547.841731.220.692.18Yes
3678.041731.220.692.18
4945.430720.910.501.67

Hardell et al., 2001 (36 PCBs, mean conc) [53]Total1436331470682831.00
11296 (med)470651411.800.853.9No

Hardell et al., 2001 (11 immunotoxic PCBs) [53]Total511118159882831.00
1462 (med)159857403.201.47.4No

Hardell et al., 2006; [54] Hardell et al., 2009 [43] (all PCBs, mean conc)Total860102422297981.00
1762 (med)422259492.000.993.99No

Hardell et al., 2006; [54] Hardell et al., 2009 [43] (11 immunotoxic PCBs)Total29041129797981.00
1238 (med)129754491.500.83.0No

Cocco et al., 2008 [46]Total174
1<200.42200.4241511.00
2200.43387.7950511.200.62.2Yes
3387.8576.3633500.700.31.4
4576.37>576.3750511.000.52.0

Quintana et al., 2004 [44]Total
1<10001000791841.00
2>10003000501511.050.631.76No
3>30009231.080.402.92

Bertrand et al., 2010 (median conc) [47]Total205409
151816361733811..00
2678>61774231820.920.511.60Yes
3815>74289434821.000.601.80
4980>894112146821.400.712.20
51385>1121532261821.900.942.90