Eye and non-eye injury rates (per 1000 person-years) in metal and comparison sectors during the different periods under analysis
| 1988–90 | 1991–92 | 1993–96 | 1997–2000 | 2001–03 | |
|---|---|---|---|---|---|
| (pre-intervention) | (peri-intervention) | (post-intervention reinforcement) | (late post-intervention) | (very late post-intervention) | |
| Referent levels for incidence rate ratios (IRR) are non-eye injury rates. | |||||
| Metal | |||||
| Eye injury rates (n/N) | 167.52 (2149/12828) | 113.19 (968/8552) | 69.82 (1310/18763) | 54.23 (1097/20230) | 35.31 (560/15858) |
| Non-eye injury rates (n/N) | 220.30 (2826/12828) | 189.43 (1620/8552) | 150.30 (2820/18763) | 128.13 (2592/20230) | 122.34 (1940/15858) |
| IRR* (95% CI) | 0.76 (0.72 to 0.80) | 0.60 (0.55 to 0.65) | 0.46 (0.43 to 0.50) | 0.42 (0.39 to 0.45) | 0.29 (0.26 to 0.32) |
| *p = 0.05 at test for trend | |||||
| Construction | |||||
| Eye injury rates (n/N) | 32.21 (341/10587) | 32.30 (228/7058) | 21.57 (322/14929) | 18.87 (274/14522) | 18.59 (193/10383) |
| Non-eye injury rates (n/N) | 109.85 (1163/10587) | 115.90 (818/7058) | 93.91 (1402/14929) | 85.11 (1236/14522) | 79.94 (830/10383) |
| IRR† (95% CI) | 0.29 (0.26 to 0.33) | 0.28 (0.24 to 0.32) | 0.23 (0.20 to 0.26) | 0.22 (0.19 to 0.25) | 0.23 (0.20 to 0.27) |
| †p = 0.16 at test for trend | |||||
| Wood/ceramics | |||||
| Eye injury rates (n/N) | 34.67 (190/5481) | 27.64 (101/3654) | 22.05 (160/7257) | 21.71 (175/8062) | 18.01 (120/6663) |
| Non-eye injury rates (n/N) | 222.59 (1220/5481) | 200.05 (731/3654) | 172.94 (1255/7257) | 154.68 (1247/8062) | 169.89 (1132/6663) |
| IRR‡ (95% CI) | 0.16 (0.13 to 0.18) | 0.14 (0.11 to 0.17) | 0.13 (0.11 to 0.15) | 0.14 (0.12 to 0.16) | 0.11 (0.09 to 0.13) |
| ‡p = 0.16 at test for trend | |||||