Supplemental table 1. Distribution of PAH concentrations (ng/g dust) measured in residential carpet dust Median Median Detections1 95th percentile – Detections1 (25th-75th (25th-75th controls maximum cases (%) percentile) percentile) (%) cases cases controls 1089.0 (603.21021.0 (530.715556.0-163180.0 2624.2) 2950.1) Total PAH2 660 (97.6) 495 (96.9) 124.0 (61.9-309.5) 113.0 (56.0-348.0) 1910.0-30500.0 benzo[a]anthracene 656 (97.0) 495 (96.9) 145.5 (67.8-346.0) 121.0 (61.6-392.0) 2380.0-25500.0 benzo[a]pyrene 668 (98.8) 507 (99.2) 270.0 (142.5-698.5) 247.0 (123.0-798.0) 3960.0-47000.0 benzo[b]fluoranthene 634 (93.8) 466 (91.2) 97.7 (53.0-235.5) 88.6 (42.1-265.0) 1330.0-13100.0 benzo[k]fluoranthene 672 (99.4) 511 (100.0) 254.0 (146.0-556.6) 247.0 (128.0-674.0) 2710.0-28000.0 chrysene 493 (72.9) 343 (67.1) 34.7 (18.5-81.5) 34.0 (12.4-91.2) 497.0-4500.0 dibenzo[a]anthracene 651 (96.3) 495 (96.9) 153.0 (83.5-392.5) 149.0 (70.4-451.0) 2580.0-32300.0 indenopyrene 1 Usual detection limit = 20.8 ng/g dust 95th percentile – maximum controls 21414.0-180190.0 2910.0-26700.0 3170.0-30300.0 5990.0-44400.0 1820.0-16500.0 3940.0-35500.0 734.0-5590.0 3760.0-37200.0 2 Total PAH = Benz(a)anthracene + Benzo(a)pyrene + Benzo(b)fluoranthene + Benzo(k)fluoranthene + Chrysene + Dibenz(a,h)anthracene + Indeno(1,2,3- c,d)pyrene 1 Supplemental table 2. Associations between PAH compounds and NHL overall, by study center PAH (ng/g dust) Total PAH2 0-3471 3472-7645 7646-16706 >=16707 Continuous3 TEQ4 0-1182 1183-2846 2847-6038 >=6039 Continuous3 BaA 0-387 388-772 773-1769 >=1770 Continuous3 BaP 0-449 450-1110 1111-2429 >=2430 Continuous3 BbF 0-934 935-2010 2011-4399 >=4400 Continuous3 BkF 0-322 323-667 668-1519 >=1520 Continuous3 Chr 0-736 737-1450 1451-3239 Detroit Cases/ Controls OR1 (95% CI) 31/20 46/18 29/19 21/20 1.00 1.66 (0.75-3.69) 1.11 (0.48-2.52) 0.83 (0.35-1.97) 0.92 (0.72-1.17) 32/20 45/18 29/19 21/20 1.00 1.63 (0.73-3.61) 1.09 (0.48-2.48) 0.84 (0.35-1.98) 0.94 (0.74-1.19) 33/19 36/19 36/19 22/20 1.00 1.05 (0.47-2.36) 1.22 (0.54-2.74) 0.76 (0.32-1.78) 0.92 (0.73-1.17) 28/19 45/19 35/18 19/21 1.00 1.65 (0.74-3.70) 1.48 (0.64-3.41) 0.75 (0.31-1.80) 0.98 (0.78-1.23) 31/19 47/18 28/20 21/20 1.00 1.67 (0.75-3.71) 0.95 (0.41-2.16) 0.79 (0.33-1.88) 0.89 (0.70-1.14) 32/19 44/19 32/19 19/20 1.00 1.43 (0.64-3.16) 1.17 (0.51-2.66) 0.71 (0.29-1.70) 0.93 (0.73-1.19) 33/19 44/19 30/19 1.00 1.31 (0.59-2.88) 1.03 (0.45-2.34) PAH (ng/g dust) Total PAH2 0-492 493-944 945-2416 >=2416 Continuous3 TEQ4 0-142 143-302 303-784 >=785 BaA 0-62 63-124 125-277 >=278 Continuous3 BaP 0-54 55-111 112-319 >=320 Continuous3 BbF 0-127 128-240 241-629 >=630 Continuous3 BkF 0-42 43-87 88-211 >=212 Continuous3 Chr 0-130 131-214 215-539 Iowa Cases/ Controls OR1 (95% CI) 42/36 45/37 71/38 37/36 1.00 1.05 (0.56-1.96) 1.64 (0.90-2.98) 0.87 (0.46-1.66) 0.97 (0.81-1.18) 39/37 40/37 74/37 42/36 1.00 1.05 (0.55-1.99) 2.00 (1.09-3.65) 1.11 (0.58-2.10) 1.02 (0.86-1.21) 49/37 47/36 55/37 44/37 1.00 1.01 (0.55-1.87) 1.15 (0.63-2.09) 0.89 (0.48-1.65) 0.96 (0.80-1.16) 33/37 50/37 70/36 42/37 1.00 1.48(0.78-2.80) 2.20(1.18-4.09) 1.24 (0.65-2.38) 1.03 (0.87-1.22) 41/36 47/37 69/37 38/37 1.00 1.15 (0.61-2.14) 1.65 (0.90-3.01) 0.91(0.48-1.73) 1.00 (0.83-1.19) 45/37 43/37 70/36 37/37 1.00 0.99 (0.53-1.85) 1.73 (0.95-3.16) 0.81 (0.43-1.53) 0.99 (0.83-1.17) 41/36 50/37 64/37 1.00 1.15 (0.62-2.14) 1.51 (0.82-2.77) PAH (ng/g dust) Total PAH2 0-383 384-566 567-918 >=919 Continuous3 TEQ4 0-124 125-219 220-357 >=358 BaA 0-39 40-56 57-96 >=97 Continuous3 BaP 0-46 47-69 70-119 >=120 Continuous3 BbF 0-81 82-128 129-219 >=220 Continuous3 BkF 0-27 28-46 47-72 >=73 Continuous3 Chr 0-106 107-156 157-252 Los Angeles Cases/ Controls OR1 (95% CI) 39/32 29/31 49/32 52/31 1.00 0.77 (0.38-1.53) 1.25 (0.65-2.39) 1.40 (0.73-2.68) 1.01 (0.76-1.33) 33/35 40/28 48/30 48/33 1.00 1.51 (0.77-2.97) 1.69 (0.87-3.27) 1.57 (0.82-3.03) 1.08 (0.83-1.42) 43/31 30/32 56/31 40/32 1.00 0.68 (0.34-1.33) 1.30 (0.69-2.46) 0.91 (0.47-1.75) 0.96 (0.74-1.25) 46/31 34/32 44/31 45/32 1.00 0.70 (0.36-1.37) 0.95 (0.50-1.82) 0.97 (0.51-1.84) 1.02 (0.80-1.30) 34/32 31/31 59/31 45/32 1.00 0.94 (0.47-1.88) 1.81 (0.94-3.49) 1.35 (0.69-2.62) 1.03 (0.80-1.33) 34/31 28/32 48/31 59/32 1.00 0.79 (0.39-1.59) 1.38 (0.71-2.70) 1.68 (0.88-3.22) 1.16 (0.92-1.47) 40/30 33/33 55/31 1.00 0.75 (0.38-1.47) 1.35 (0.71-2.59) PAH (ng/g dust) Total PAH2 0-640 641-1022 1023-1959 >=1960 Continuous3 TEQ4 0-190 191-366 367-647 >=648 BaA 0-66 67-113 114-206 >=207 Continuous3 BaP 0-68 69-121 122-257 >=258 Continuous3 BbF 0-139 140-258 259-539 >=540 Continuous3 BkF 0-50 51-95 96-168 >=169 Continuous3 Chr 0-135 136-252 253-437 Seattle Cases/ Controls OR1 (95% CI) 40/41 51/39 58/40 36/41 1.00 1.37 (0.74-2.50) 1.51 (0.83-2.75) 0.92 (0.49-1.72) 0.92 (0.77-1.11) 38/42 55/39 53/41 39/39 1.00 1.58 (0.86-2.89) 1.45 (0.79-2.64) 1.12 (0.60-2.10) 0.95 (0.80-1.13) 41/41 42/39 61/40 41/41 1.00 1.10 (0.59-2.04) 1.54 (0.86-2.79) 1.02 (0.55-1.89) 1.00 (0.84-1.18) 37/40 41/40 67/39 40/42 1.00 1.12 (0.60-2.10) 1.88 (1.03-3.41) 1.05 (0.56-1.96) 0.96 (0.82-1.13) 40/40 51/40 59/40 35/41 1.00 1.29 (0.70-2.36) 1.50 (0.82-2.72) 0.87 (0.46-1.64) 0.90 (0.75-1.07) 35/40 61/40 49/39 40/42 1.00 1.76 (0.96-3.23) 1.45 (0.78-2.69) 1.11 (0.59-2.08) 0.96 (0.81-1.13) 37/40 56/40 48/40 1.00 1.54 (0.84-2.82) 1.32 (0.71-2.45) 2 >=3240 Continuous3 DBaA 0-101 102-233 234-495 >=496 Continuous3 IdP 0-509 510-1170 1171-2629 >=2630 Continuous3 20/20 0.70 (0.30-1.67) 0.90 (0.71-1.15) 30/18 48/20 26/19 23/20 1.00 1.58 (0.71-3.52) 0.95 (0.40-2.23) 0.90 (0.37-2.14) 0.91 (0.72-1.14) 29/20 45/18 32/19 21/20 1.00 1.84 (0.82-4.10) 1.29 (0.56-2.94) 0.91 (0.38-2.16) 0.93 (0.73-1.17) >=540 Continuous3 DBaA 0-9 10-27 28-68 >=69 Continuous3 IdP 0-59 60-125 126-310 >=311 Continuous3 40/37 0.93 (0.49-1.75) 0.91 (0.75-1.12) 37/36 48/37 67/37 43/37 1.00 1.37 (0.72-2.60) 1.94 (1.04-3.62) 1.17 (0.62-2.22) 1.04 (0.90-1.19) 37/36 51/37 59/37 48/37 1.00 1.40 (0.75-2.62) 1.60 (0.86-2.98) 1.29 (0.68-2.42) 1.00 (0.85-1.18) >=253 Continuous3 DBaA 0-8 9-22 23-36 >=37 Continuous3 IdP 0-57 58-86 87-144 >=145 Continuous3 41/32 0.97 (0.50-1.88) 0.97 (0.74-1.27) 32/32 44/31 54/31 39/32 1.00 1.40 (0.71-2.74) 1.74 (0.90-3.39) 1.23 (0.62-2.42) 1.07 (0.88-1.30) 46/32 24/31 55/31 44/32 1.00 0.53 (0.26-1.07) 1.22 (0.65-2.31) 0.97 (0.51-1.84) 0.96 (0.76-1.21) >=438 Continuous3 DBaA 0-16 17-34 35-62 >=63 Continuous3 IdP 0-84 85-160 161-316 >=317 Continuous3 44/41 1.19 (0.64-2.22) 0.93 (0.77-1.13) 40/41 60/38 42/41 43/41 1.00 1.63 (0.89-2.96) 1.06 (0.57-1.96) 1.08 (0.59-2.00) 0.98 (0.84-1.14) 41/41 65/39 42/40 37/41 1.00 1.70 (0.94-3.07) 1.06 (0.57-1.96) 0.92 (0.49-1.72) 0.92 (0.78-1.09) 1 Models adjusted for age and sex 2 Total PAH = Benz(a)anthracene + Benzo(a)pyrene + Benzo(b)fluoranthene + Benzo(k)fluoranthene + Chrysene + Dibenz(a,h)anthracene + Indeno(1,2,3-c,d)pyrene 3 ORs per one ln(PAH) (ng/g dust) 4 TEQ = sum of Benz(a)anthracene + Benzo(a)pyrene + Benzo(b)fluoranthene + Benzo(k)fluoranthene + Chrysene + Dibenz(a,h)anthracene + Indeno(1,2,3-c,d)pyrene, each weighted by their toxic equivalency factor (TEF). 3