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. Author manuscript; available in PMC: 2015 Nov 1.
Published in final edited form as: Environ Res. 2014 Sep 27;135:9–14. doi: 10.1016/j.envres.2014.08.022

Table 1.

Summary statisticsa for NCCLS and FOX study dust samplesb, compared to results from similar studies. All concentrations in ng/g. GM/GSD = geometric mean/geometric standard deviation

Northern California Childhood Leukemia Study
2010 (n=59)
 Firefighter Occupational Exposure Study
Southern California
2010-2011 (n = 27)
 Boston, MA Area Homes
(Stapleton and others 2008)
2006 (n=7-10)
 San Francisco Bay
Area, CA Homes
(Dodson and others 2012);
2006 (n=16)
 San Francisco Bay
Area, CA
Homes(Dodson and others 2012)
2011 (n=16)
 Vancouver, BC, homes
(Shoeib and others 2012)
2007-2008 n=116
%
Detect		 Blankc
(ng, n=7)		 GM GSD Mina Median Max %
Detect		 Blankc
(ng, n =3)		 GM GSD Mina Median Max GM GSD Min Max Min Median Max Min Median Max Min Median Max
β-DBE-DBCH 54.2 <0.64 1.46 3.46 <0.64 0.91 359 21.7 <0.64 0.76 1.47 <0.64 <0.64b 2.33 <2 <2 11 <2 <2 16
α-DBE-DBCH 54.2 <0.64 1.38 3.34 <0.64 0.75 307 21.7 <0.64 0.74 1.42 <0.64 <0.64b 2.07 <2 <2 13 <2 <2 25
BATE 0.0 <0.64 <0.64 1.00 <0.64 <0.64 <0.64 4.3 <0.64 0.66 1.16 <0.64 <0.64 1.28 – – – – – – <0.08 0.9 4.6
PBT 28.8 <0.64 0.87 1.92 <0.64 <0.64 7.87 73.9 <0.64 1.30 1.84 <0.64 1.39b 5.28 <0.02 0.30 12
PBEB 44.1 <0.64 1.26 2.60 <0.64 <0.64 12.8 82.6 <0.64 1.79 2.53 <0.64 1.89b 21.4 <0.07 0.5 4.1
TBP-DBPE 28.8 <0.64 0.79 1.58 <0.64 <0.64 4.21 73.9 <0.64 1.24 1.93 <0.64 1.01b 4.68 <2 <2 2 - - - <0.30 1.5 1,200
HBB 81.4 <0.64 2.02 2.53 <0.64 1.85 16.3 91.3 <0.64 7.78 2.84 <0.64 9.40b 27.4 <2 1 8 <2 <2 13 <0.02 3.7 130
EH-TBB 93.2 <0.64 310 8.59 <0.64 337 19198 91.3 0.88 1400 17.3 <0.64 2687b 29007 91.1 2.6 35.7 669 4 48 740 45 100 5900 <0.30 120 18,000
BEH-TEBP 93.2 0.99 144 5.94 <0.64 186 3483 91.3 <0.64 1096 12.0 <0.64 2076b 11422 65.8 1.7 24.3 111 36 140 1900 <2 260 3800 10 99 6,400
BTBPE 93.2 <0.64 21.8 4.41 <0.64 22.3 1505 91.3 <0.64 31.3 4.84 <0.64 28.4 626 17.7 3.6 2.5 219 7 30 220 3 12 130 1.8 30 610
DBDPE 78.0 <2.60 53.5 6.40 <2.60 82.8 5564 82.6 <2.60 96.5 5.99 <2.60 161b 1650 39.4 6.7 <10 262 <10 51 430 18 140 2800
a

Summary statistics calculated using value of LOD for non-detects.

b

Dust-NBFR concentrations differed between the NCCLS and FOX study using the non-parametric Wilcoxon–Mann–Whitney test, p<0.05

c

< X.X – Below lowest calibration standard converted to ng/g