From: A risk model and nomogram for high-frequency hearing loss in noise-exposed workers
Variable | All subjects | Training cohort | Validation cohort | |||
---|---|---|---|---|---|---|
(n = 32,121) | (n = 25,732) | (n = 6389) | ||||
n | % | n | % | n | % | |
Sex | ||||||
 Male | 23,661 | 73.66 | 6828 | 73.46 | 1632 | 74.46 |
 Female | 8460 | 26.34 | 18,904 | 26.54 | 4757 | 25.54 |
Age (years) | ||||||
  < 25 | 1908 | 5.94 | 1525 | 5.93 | 383 | 5.99 |
 25–29 | 4191 | 13.05 | 3369 | 13.09 | 822 | 12.87 |
 30–34 | 3888 | 12.10 | 3120 | 12.12 | 768 | 12.02 |
 35–39 | 4559 | 14.19 | 3675 | 14.28 | 884 | 13.84 |
 40–44 | 8868 | 27.61 | 7085 | 27.53 | 1783 | 27.9 |
  ≥ 45 | 8707 | 27.11 | 6958 | 27.04 | 1749 | 27.38 |
NED (years) | ||||||
 0–4 | 13,511 | 42.06 | 10,840 | 42.13 | 2671 | 41.81 |
 5–9 | 8137 | 25.33 | 6521 | 25.34 | 1616 | 25.29 |
 10–14 | 3742 | 11.65 | 2967 | 11.53 | 775 | 12.13 |
 15–19 | 2006 | 6.25 | 1625 | 6.32 | 381 | 5.96 |
 20–24 | 2775 | 8.64 | 2227 | 8.65 | 548 | 8.58 |
 25–29 | 1441 | 4.49 | 1152 | 4.48 | 289 | 4.52 |
  ≥ 30 | 509 | 1.58 | 400 | 1.55 | 109 | 1.71 |
Industry type | ||||||
 Manufacturing | 23,295 | 72.52 | 18,673 | 72.57 | 4622 | 72.34 |
 Construction | 294 | 0.92 | 232 | 0.90 | 62 | 0.97 |
 Mining | 3341 | 10.40 | 2670 | 10.38 | 671 | 10.51 |
 Others a | 5191 | 16.16 | 4157 | 16.15 | 1034 | 16.18 |
Enterprise type | ||||||
 SOE | 9661 | 30.08 | 7762 | 30.16 | 1899 | 29.72 |
 FOE | 2446 | 7.61 | 1978 | 7.69 | 468 | 7.33 |
 POE | 20,014 | 62.31 | 15,992 | 62.15 | 4022 | 62.95 |