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. 2015 Sep 15;124(4):420–425. doi: 10.1289/ehp.1509755

Table 2.

Descriptive statistics of analytes by sampling round (51 participants, 137 serum samples).

Analytes Round 1 (n = 47) Round 2 (n = 49) Round 3 (n = 41)
GM (GSD) % Range GM (GSD) % Range GM (GSD) % Range
Serum PBDEs (ng/g lipid)
∑PBDEa 22 (2.7) 100 2.3–290 23 (2.4) 100 2.7–290 19 (2.1) 100 2.4–210
BDE-28a 0.57 (2.3) 66 0.20–4.3 0.60 (2.2) 71 0.20–5.1 0.50 (2.2) 66 0.20–3.6
BDE-47a 9.5 (2.9) 100 0.60–150 9.9 (2.7) 100 1.3–150 7.6 (2.6) 100 0.90–99
BDE-99a 1.8 (3.0) 94 0.20–44 1.9 (3.0) 90 0.20–34 1.7 (2.5) 95 0.20–20
BDE-100a 1.8 (3.5) 87 0.20–42 1.9 (3.3) 90 0.20–44 1.4 (3.0) 90 0.20–35
BDE-153a 6.4 (3.2) 100 0.60–97 6.7 (3.1) 100 0.70–95 5.3 (3.3) 100 0.10–55
Serum PBDEs (pg/g serum)
∑PBDEa 130 (2.7) 100 14–1,900 140 (2.7) 100 15–2,000 120 (2.4) 100 15–1,500
BDE-28a 3.5 (2.4) 66 1.3–29 3.7 (2.4) 71 1.3–30 3.3 (2.3) 66 1.3–25
BDE-47a 57 (3.0) 100 3.9–990 59 (2.8) 100 7.3–1,000 48 (2.7) 100 5.5–710
BDE-99a 11 (3.0) 94 1.3–290 11 (3.2) 90 1.3–230 10 (2.6) 95 1.3–140
BDE-100a 11 (3.1) 87 1.3–280 11 (3.4) 90 1.3–300 8.0 (3.1) 90 1.3–250
BDE-153a 38 (3.6) 100 3.9–700 39 (3.1) 100 4.5–580 36 (2.7) 100 5.3–400
Thio (μg/L)a 450 (470) 100 72–2,300 570 (360) 100 61–1,500 480 (450) 100 16–1,800
Perchl (μg/L)a 3.8 (4.3) 100 0.40–19 2.9 (18) 100 0.40–130 5.2 (11) 100 0.40–73
TT4 (μg/dL)b 7.3 (1.3) 100 3.2–9.6 7.3 (1.4) 100 3.9–10 7.1 (1.3) 100 4.7–9.2
fT4 (ng/dL)a 1.2 (1.2) 100 0.90–2.1 1.2 (1.2) 100 1.0–2.2 1.2 (1.2) 100 1.0–1.6
TSH (μIU/mL)a 0.71 (1.8) 100 0.20–2.7 0.75 (1.8) 100 0.25–2.3 0.89 (1.9) 100 0.18–4.8
TT3 (ng/mL)a 1.1 (1.2) 100 0.78–1.5 1.2 (1.2) 100 0.80–1.4 1.2 (1.2) 100 0.82–1.5
UIC (μg/L)a 130 (170) 100 27–890 140 (100) 100 11–550 150 (116) 100 32–660
Urinary SGb 1.02 (0.007) 100 1.00–1.03 1.02d (0.009) 100 1.00–1.04 1.02 (0.007) 100 1.00–1.03
TPO Ab (IU/mL)c 3 NA 6 < 5.0–810 3.0 NA 6 < 5.0–680 3.0 NA 7 < 5.0–640
Chol (mg/dL)b 190 (34) 100 120–290 190 (46) 100 110–360 190 (44) 100 92–330
Trig (mg/dL)b 130 (70) 100 50–340 130 (71) 100 42–340 140 (66) 100 45–290
Lipids (mg/dL)b,e 620 (110) 100 450–860 620 (150) 100 370–1,100 630 (140) 100 330–1,000
Abbreviations: %, percent detected; BDE, bromodiphenyl ether; Chol, cholesterol; fT4, free thyroxine; GM, geometric mean; GSD, geometric standard deviation; Lipids, total lipids; NA, not applicable; SG, specific gravity; PBDE; pentabromodiphenyl ether; Perchl, perchlorate; Thio, thiocyanate; TPO Ab, thyroid peroxidase antibody; Trig, triglycerides; TSH, thyroid-stimulating hormone; TT3, total triiodothyronine; TT4, total thyroxine; UIC, urinary iodine concentration. aGeometric mean and geometric standard deviation. bMean and standard deviation. cNumber of participants who tested positive for TPO Ab in each round. dOne specific gravity measurement was missing in round 2. eTotal lipids = [cholesterol (mg/dL) × 2.27] + triglycerides (mg/dL) + 62.3.