Table 1.
Baseline characteristics of incident skin lesions cases, matched controls, and a random sample of the HEALS cohort, Health Effects of Arsenic Longitudinal Study, Bangladesh, 2000–2009.a
| Characteristicsb | Skin lesion cases | Matched skin lesion controls | Random subcohort | |
|---|---|---|---|---|
| n | 466 | 464 | 1469 | |
| Sex | Male | 325 (69.7%) | 314 (67.7%) | 541 (36.8%) |
| Female | 141 (30.3%) | 150 (32.3%) | 928 (63.2%) | |
| Age | Years | 44.8 (9.2) | 44.8 (9.1) | 35.1 (9.1) |
| Education | 0 | 227 (48.8%) | 191 (41.2%) | 603 (41.0%) |
| 1–5 | 129 (27.7%) | 138 (29.7%) | 465 (31.7%) | |
| 6–16 | 109 (23.4%) | 135 (29.1%) | 401 (27.3%) | |
| BMI | < 18.5 | 195 (42.3%) | 191 (41.2%) | 525 (35.9%) |
| 18.5–24.9 | 246 (53.4%) | 239 (51.5%) | 822 (56.2%) | |
| > 25 | 20 (4.3%) | 34 (7.3%) | 116 (7.9%) | |
| Smoking | Never | 185 (39.7%) | 198 (42.6%) | 1014 (69.0%) |
| Former | 70 (15.0%) | 57 (12.3%) | 67 (4.6%) | |
| Current | 211 (45.3%) | 209 (45.0%) | 388 (26.4%) | |
| Own TV | Yes | 145(31.1%) | 183 (39.4%) | 505 (34.4%) |
| Own land | Yes | 264 (56.7%) | 277 (59.7%) | 758 (51.6%) |
| Water arsenic (μg/L) | 0.1–10 | 72 (15.5%) | 148 (31.9%) | 362 (24.6%) |
| 10.1–50 | 61 (13.1%) | 111 (23.9%) | 342 (23.3%) | |
| 50.1–150 | 133 (28.5%) | 132 (28.4%) | 449 (30.6%) | |
| 150.1+ | 200 (42.9%) | 73 (15.7%) | 316 (21.5%) | |
| Creatinine-adjusted urinary arsenic (μg/g) | < 105 | 82 (18.2%) | 143 (31.0%) | 366 (24.9%) |
| 105- < 194 | 82 (18.2%) | 138 (29.9%) | 358 (24.4%) | |
| 194- < 329 | 116 (25.7%) | 96 (20.8%) | 363 (24.7%) | |
| 329+ | 171 (37.9%) | 85 (18.4%) | 382 (26.0%) | |
| Daily arsenic dose (μg/day) | < 30.4 | 71 (15.3%) | 147 (31.7%) | 366 (24.9%) |
| 30.4- < 147 | 75 (16.2%) | 125 (26.9%) | 363 (24.7%) | |
| 147- < 376 | 128 (27.6%) | 92 (19.8%) | 368 (25.1%) | |
| 376+ | 190 (40.9%) | 100 (21.6%) | 372 (25.3%) | |
| T/S ratio | 0.771 (0.167) | 0.802 (0.161) | 0.804 (0.167) | |
| T/S quartiles | < 0.69 | 171 (36.7%) | 119 (25.6%) | 368 (25.1%) |
| 0.69- < 0.78 | 104 (22.3%) | 110 (23.7%) | 367 (25.0%) | |
| 0.78- < 0.90 | 110 (23.6%) | 127 (27.4%) | 367 (25.0%) | |
| 0.90+ | 81 (17.4%) | 108 (23.3%) | 367 (25.0%) | |
a
Categorical variables are shown in counts and percentages; continuous variables in mean (standard deviation).
b
bNote that some variables have missing values, with a maximum of 15 subjects missing any 1 variable