Table 4.
Summary statistics for specific gravity-corrected urinary VOC biomarker concentrations (ng/ml) among hairdressers by salon type.a,b
| Hairdressers from Black Salons (N=11) | Hairdressers from Dominican Salons (N=12) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Biomarker | LOD | DF% | GM | Min | p50 (p25-p75) | Max | DF% | GM | Min | p50 (p25-p75) | Max |
| 2CAEMA | 2.2 | 100 | 133 | 21.1 | 169 (61.2–253) | 463 | 100 | 40.7 | 15.9 | 37.5 (21.0–67.7) | 200 |
| 2CAHEMA | 9.4 | 82 | 20.4 | <LOD | 23.7 (10.0–34.5) | 109 | 42 | <LOD | <LOD | <LOD | 36.8 |
| MCAMA | 6.26 | 100 | 168 | 22.3 | 159 (109–282) | 1,240 | 100 | 88.1 | 47.1 | 90.9 (56.9–120) | 186 |
| 2ATCA | 15 | 91 | 493 | <LOD | 802 (390–1210) | 1,980 | 100 | 244 | 51.0 | 289 (120–465) | 1150 |
| BZMA | 0.5 | 100 | 21.8 | 1.69 | 26.3 12.9–46.8) | 148 | 100 | 9.86 | 1.56 | 10.8 (3.17–22.2) | 160 |
| 1-PMA | 1.2 | 100 | 19.7 | 1.32 | 18.0 (2.26–115) | 307 | 83 | 11.8 | <LOD | 12.2 (3.49–24.3) | 730 |
| 2COEMA | 6.96 | 100 | 262 | 13.7 | 309 (238–426) | 701 | 100 | 113 | 43.9 | 89.9 (56.2–206) | 554 |
| 3HPMA | 13 | 100 | 940 | 40.9 | 1070 (642–2360) | 3,490 | 100 | 505 | 78.5 | 666 (235–1150) | 1,890 |
| 1CYHEMA | 2.6 | 18 | <LOD | <LOD | <LOD | 157 | 0 | <LOD | <LOD | <LOD | <LOD |
| 2CYEMA | 0.5 | 91 | 8.22 | <LOD | 5.46 (2.51–35.9) | 504 | 67 | 0.977 | <LOD | 1.04 (<LOD-1.95) | 4.37 |
| 34BMA | 5.25 | 100 | 651 | 60.6 | 742 (500–1260) | 1,690 | 100 | 369 | 145 | 412 (247–602) | 683 |
| 4HBEMA | 0.6 | 100 | 20.1 | 1.19 | 22.3 (10.3–44.6) | 111 | 100 | 9.98 | 2.76 | 9.56 (3.80–18.5) | 67.6 |
| 2HEMA | 0.791 | 91 | 2.88 | <LOD | 2.9 (1.96–5.2) | 9.49 | 58 | 1.15 | <LOD | 1.28 (<LOD-2.1) | 3.13 |
| HMFA | 36.1 | 100 | 7160 | 531 | 7,810 (2,890–30,600) | 31,700 | 100 | 2,320 | 434 | 2080 (1160–4290) | 16,400 |
| HMFG | 16 | 100 | 779 | 74.7 | 1020 (217–2,350) | 2,640 | 100 | 344 | 82.8 | 338 (156–1610) | 1,610 |
| 5HMP | 0.3 | 100 | 95.6 | 16.3 | 123 (63.4–148) | 202 | 100 | 44.5 | 8.11 | 48.6 (22.2–103) | 193 |
| 2HPMA | 5.3 | 100 | 70.4 | 5.59 | 94.1 (62.0–118) | 183 | 100 | 32.0 | 9.99 | 47.75 (12.45–59.6) | 69.8 |
| 3HMPMA | 3 | 100 | 793 | 46.2 | 616 (528–2,060) | 6,500 | 100 | 534 | 101 | 699 (412–925) | 1,650 |
| 4HMBEMA | 1.2 | 91 | 13.6 | <LOD | 13.1 (8.72–22.2) | 120 | 100 | 7.25 | 1.48 | 11.4 (2.36–17.9) | 22.7 |
| MADA | 12 | 100 | 320 | 24.8 | 299 (228–662) | 1,710 | 100 | 26.3 | 26.3 | 191 (128–26.0) | 487 |
| 1PHHEMA + 2PHHEMA | 0.7 | 82 | 2.30 | <LOD | 3.19 (1.51–4.10) | 9.44 | 58 | 1.24 | <LOD | 1.57 (<LOD-2.60) | 3.93 |
| 3MHA + 4MHA | 8 | 100 | 355 | 45.7 | 385 (206–628) | 1,380 | 100 | 84.4 | 20 | 118 (37.9–152) | 242 |
| 2MHA | 5 | 100 | 47.4 | 11.2 | 40.5 (31.9–92.1) | 135 | 92 | 13.1 | <LOD | 14.9 (7.02–27.6) | 33.2 |
| MUCA | 9.81 | 91 | 115 | <LOD | 113 (74.6–307) | 572 | 100 | 41.8 | 18 | 39.2 (25.0–62.1) | 170 |
| PHMA | 0.15 | 64 | 0.308 | <LOD | 0.208 (<LOD-0.329) | 4.23 | 42 | <LOD | <LOD | <LOD | 0.504 |
| N2FG | 64.4 | 100 | 9,320 | 1830 | 8,620 (2,540–21,900) | 182,000 | 100 | 4,200 | 1000 | 3,520 (1,560–9,960) | 22,800 |
| PHGA | 12 | 100 | 458 | 34.1 | 458 (353–556) | 2340 | 100 | 238 | 68.7 | 283 (162–381) | 560 |
| TTCA | 11.2 | 91 | 45.3 | <LOD | 44.1 (28.7–83.3) | 153 | 83 | 36.7 | <LOD | 29.1 (19.6–58.1) | 843 |
a
GM and percentile values are only reported when > 50% of participant samples had detectable levels.
b
Wilcoxon-Mann Whitney test was used to compare differences in median VOC biomarker concentrations between hairdressers working in Black versus Dominican Salons.
Significant findings are listed in boldface (p < 0.05).
Abbreviations: LOD, Limit of detection; DF, Detection Frequency; GM, Geometric Mean; p#: represents percentiles.