Univariable associations between sentinel injury characteristics and work-related subsequent injury
| Variable | No subsequent work-related injury (n=407) | Subsequent work-related injury* (n=243) | RR (95% CI) | P value |
| n (%) | n (%) | |||
| Intracranial | ||||
| No | 403 (99) | 237 (98) | Ref | |
| Yes | 4 (1) | 6 (3) | 1.62 (0.97 to 2.72) | 0.07 |
| Head/neck superficial | ||||
| No | 399 (98) | 234 (96) | Ref | |
| Yes | 1.43 (0.90 to 2.27) | 0.13 | ||
| Spine sprain/strain | ||||
| No | 312 (77) | 182 (75) | Ref | |
| Yes | 95 (23) | 61 (25) | 1.06 (0.85 to 1.33) | 0.61 |
| Upper extremity fracture | ||||
| No | 361 (89) | 210 (86) | Ref | |
| Yes | 46 (11) | 33 (14) | 1.14 (0.86 to 1.51) | 0.38 |
| Upper extremity dislocation/sprain/strain | ||||
| No | 340 (84) | 198 (82) | Ref | |
| Yes | 67 (17) | 45 (19) | 1.09 (0.85 to 1.40) | 0.50 |
| Upper extremity open wound | ||||
| No | 371 (91) | 222 (91) | Ref | |
| Yes | 36 (9) | 21 (9) | 0.98 (0.69 to 1.40) | 0.93 |
| Upper extremity superficial | ||||
| No | 392 (96) | 231 (95) | Ref | |
| Yes | 15 (4) | 12 (5) | 1.20 (0.78 to 1.85) | 0.41 |
| Lower extremity fracture | ||||
| No | 355 (87) | 226 (93) | Ref | |
| Yes | 52 (13) | 17 (7) | 0.63 (0.41 to 0.97) | 0.04 |
| Lower extremity dislocation/sprain/strain | ||||
| No | 345 (85) | 207 (85) | Ref | |
| Yes | 62 (15) | 36 (15) | 0.98 (0.74 to 1.30) | 0.89 |
| Lower extremity open wound | ||||
| No | 383 (94) | 237 (98) | Ref | |
| Yes | 24 (6) | 6 (3) | 0.52 (0.25 to 1.08) | 0.08 |
| Lower extremity superficial | ||||
| No | 382 (94) | 229 (94) | Ref | |
| Yes | 25 (6) | 14 (6) | 0.96 (0.62 to 1.48) | 0.85 |
| Other regions/nature | ||||
| No | 331 (81) | 196 (81) | Ref | |
| Yes | 76 (19) | 47 (19) | 10.3 (0.80 to 1.32) | 0.83 |
| Injury severity | ||||
| NISS 1–3 (low) | 224 (55) | 127 (52) | Ref | |
| NISS 4–6 | 133 (33) | 86 (35) | 1.09 (0.87 to 1.35) | |
| NISS >6 (high) | 34 (8) | 19 (8) | 0.99 (0.67 to 1.46) | 0.74 |
| Hospitalisation | ||||
| No | 315 (77) | 202 (83) | Ref | |
| Yes | 92 (23) | 41 (17) | 0.79 (0.60 to 1.04) | 0.09 |
| Trouble accessing healthcare services | ||||
| No | 361 (89) | 223 (92) | Ref | |
| Yes/mixed | 39 (10) | 18 (7) | 0.83 (0.56 to 1.23) | 0.35 |
| Threat to life/disability | ||||
| No | 205 (50) | 128 (53) | Ref | |
| Yes | 194 (48) | 113 (47) | 0.96 (0.78 to 1.17) | 0.67 |
*At least one work-related subsequent injury claim in the 24 months of follow-up.
NISS, New Injury Severity Scores.