MSHA district | Age range | Number of miners examined | Observed number of CWP | Predicted number of CWP | Observed CWP prevalence (%) | Predicted CWP prevalence (%) |
2. Bituminous coal regions in PA | ≤19 | 1 | 0 | 0.0 | 0 | 1 |
20–29 | 84 | 1 | 1.4 | 1 | 2 | |
30–39 | 129 | 0 | 2.9 | 0 | 2 | |
40–49 | 142 | 3 | 5.4 | 2 | 4 | |
50–59 | 471 | 14 | 25.5 | 3 | 5 | |
≥60 | 84 | 4 | 6.0 | 5 | 7 | |
3. MD, OH, northern WV | ≤19 | 10 | 0 | 0.1 | 0 | 1 |
20–29 | 148 | 1 | 2.3 | 1 | 2 | |
30–39 | 207 | 0 | 4.5 | 0 | 2 | |
40–49 | 218 | 8 | 8.1 | 4 | 4 | |
50–59 | 785 | 23 | 42.9 | 3 | 5 | |
≥60 | 136 | 7 | 9.8 | 5 | 7 | |
4. Southern WV | ≤19 | 0 | NA | NA | NA | NA |
20–29 | 106 | 0 | 1.7 | 0 | 2 | |
30–39 | 216 | 1 | 5.1 | 0 | 2 | |
40–49 | 282 | 23 | 11.6 | 8 | 4 | |
50–59 | 607 | 89 | 36.8 | 15 | 6 | |
≥60 | 69 | 12 | 5.5 | 17 | 8 | |
5. VA | ≤19 | 0 | NA | NA | NA | NA |
20–29 | 29 | 0 | 0.5 | 0 | 2 | |
30–39 | 79 | 1 | 1.8 | 1 | 2 | |
40–49 | 242 | 25 | 8.6 | 10 | 4 | |
50–59 | 316 | 30 | 15.2 | 9 | 5 | |
≥60 | 23 | 6 | 1.5 | 26 | 6 | |
6. Eastern KY | ≤19 | 0 | NA | NA | NA | NA |
20–29 | 29 | 0 | 0.5 | 0 | 2 | |
30–39 | 70 | 0 | 1.6 | 0 | 2 | |
40–49 | 174 | 28 | 6.3 | 16 | 4 | |
50–59 | 132 | 29 | 6.9 | 22 | 5 | |
≥60 | 18 | 1 | 1.2 | 6 | 7 | |
7. Central KY, NC, SC, TN | ≤19 | 6 | 0 | 0.1 | 0 | 1 |
20–29 | 67 | 0 | 1.1 | 0 | 2 | |
30–39 | 103 | 1 | 2.4 | 1 | 2 | |
40–49 | 192 | 19 | 6.9 | 10 | 4 | |
50–59 | 143 | 28 | 7.2 | 20 | 5 | |
≥60 | 11 | 1 | 0.8 | 9 | 7 | |
8. IL, IN, IA, MI, MN, northern MO, WS | ≤19 | 43 | 0 | 0.5 | 0 | 1 |
20–29 | 682 | 2 | 10.5 | 0 | 2 | |
30–39 | 613 | 2 | 13.2 | 0 | 2 | |
40–49 | 564 | 1 | 19.4 | 0 | 3 | |
50–59 | 729 | 10 | 38.2 | 1 | 5 | |
≥60 | 82 | 1 | 5.7 | 1 | 7 | |
9. States west of the Mississippi river* | ≤19 | 73 | 0 | 0.9 | 0 | 1 |
20–29 | 686 | 1 | 12.3 | 0 | 2 | |
30–39 | 529 | 5 | 14.0 | 1 | 3 | |
40–49 | 524 | 8 | 18.2 | 2 | 3 | |
50–59 | 464 | 13 | 21.3 | 3 | 5 | |
≥60 | 75 | 1 | 4.8 | 1 | 6 | |
10. Western KY | ≤19 | 28 | 0 | 0.3 | 0 | 1 |
20–29 | 339 | 2 | 5.1 | 1 | 2 | |
30–39 | 346 | 2 | 7.5 | 1 | 2 | |
40–49 | 222 | 10 | 7.6 | 5 | 3 | |
50–59 | 240 | 12 | 11.7 | 5 | 5 | |
≥60 | 15 | 1 | 0.9 | 7 | 6 | |
11. AL, GA, FL, MS, PR, VI | ≤19 | 3 | 0 | 0.0 | 0 | 1 |
20–29 | 64 | 0 | 1.0 | 0 | 2 | |
30–39 | 91 | 0 | 2.0 | 0 | 2 | |
40–49 | 175 | 4 | 6.7 | 2 | 4 | |
50–59 | 424 | 10 | 23.0 | 2 | 5 | |
≥60 | 68 | 6 | 4.9 | 9 | 7 |
↵* Except Minnesota, Iowa and northern Missouri.
Districts are labelled with two letter US state abbreviations. MSHA district maps are available at http://www.msha.gov/DISTRICT/COALHOME.HTM.
CWP, coal workers' pneumoconiosis; MSHA, Mine Safety and Health Administration; NIOSH, National Institute for Occupational Safety and Health.