Table 1. Profile of patients successfully followed up and patients lost to follow-up.
| Population characteristic |
Followed up (N = 2,269) |
Complete loss to follow-up (N = 155) |
P value | |
|---|---|---|---|---|
| Age group | N (%: 95% CI) | <0.001 | ||
| 18–24 years | 303 (13.4%: 12.0% to 14.8%) | 36 (23.2%: 17.2% to 30.5%) | ||
| 25–34 years | 321 (14.2%: 12.8% to 15.6%) | 42 (27.1%: 20.7% to 34.7%) | ||
| 35–44 years | 315 (13.9%: 12.5% to 15.4%) | 25 (16.1%: 11.1% to 22.8%) | ||
| 45–54 years | 315 (13.9%: 12.5% to 15.4%) | 25 (16.1%: 11.1% to 22.8%) | ||
| 55–64 years | 325 (14.3%: 12.9% to 15.8%) | 15 (9.7%: 5.9% to 15.5%) | ||
| 65–74 years | 255 (11.2%: 10.0% to 12.6%) | 4 (2.6%: 0.9% to 6.7%) | ||
| 75+ years | 435 (19.2%: 17.6% to 20.8%) | 8 (5.2%: 2.6% to 10.0%) | ||
| Gender | N (%: 95% CI) | 0.07 | ||
| Male | 1,615 (71.2%: 69.3% to 73.0%) | 121 (78.1%: 70.8% to 83.9%) | ||
| Female | 654 (28.8%: 27.0% to 30.7%) | 34 (21.9%: 16.1% to 29.2%) | ||
| Compensable statusa | N (%: 95% CI) | 0.34 | ||
| Not compensable | 1,294 (57.5%: 55.4% to 59.5%) | 94 (61.4%: 53.4% to 68.8%) | ||
| Compensable | 958 (42.5%: 40.5% to 44.6%)) | 59 (38.6%: 31.2% to 46.5%) | ||
| Charlson Comorbidity Index | N (%: 95% CI) | 0.09 | ||
| None | 1,474 (65.0%: 63.0% to 66.9%) | 99 (63.9%: 56.0% to 71.1%) | ||
| 1 | 594 (26.2%: 24.4% to 28.0%) | 49 (31.6%: 24.8% to 39.4%) | ||
| 2+ | 201 (8.8%; 7.8% to 10.1%) | 7 (4.5%: 2.2% to 9.2%) | ||
| Preexisting mental health/drug/alcohol conditionb | N (%: 95% CI) | <0.001 | ||
| No | 1,618 (73.4%: 71.5% to 75.2%) | 91 (60.3%: 52.2% to 67.8%) | ||
| Yes | 586 (26.6%: 24.8% to 28.5%) | 60 (39.7%: 32.2% to 47.8%) | ||
| Region of residencec | N (%: 95% CI) | 0.04 | ||
| Major cities | 1,577 (71.6%: 69.6% to 73.4%) | 114 (79.7%: 72.3% to 85.5%) | ||
| Regional or remote | 627 (28.4%: 26.6% to 30.4%) | 29 (20.3%: 14.5% to 27.7%) | ||
| Socioeconomic status (IRSAD)c | N (%: 95% CI) | 0.12 | ||
| 1 (Most disadvantaged) | 283 (12.8%: 11.5% to 14.3%) | 25 (17.5%: 12.1% to 24.6%) | ||
| 2 | 288 (13.1%: 11.7% to 14.5%) | 14 (9.8%: 5.9% to 15.9%) | ||
| 3 | 406 (18.4%: 16.9% to 20.1%) | 33 (23.1%: 16.9% to 30.7%) | ||
| 4 | 634 (28.8%: 26.9% to 30.7%) | 31 (21.7%: 15.7% to 29.2%) | ||
| 5 (Least disadvantaged) | 593 (26.9%: 25.1% to 28.8%) | 40 (28.0%: 21.2% to 35.9%) | ||
| Type of injury | N (%: 95% CI) | <0.001 | ||
| Blunt | 2,112 (93.1%: 92.0% to 94.1%) | 127 (81.9%: 75.0% to 87.2%) | ||
| Penetrating | 82 (3.6%: 2.9% to 4.5%) | 21 (13.6%: 9.0% to 19.9%) | ||
| Burn | 59 (2.6%: 2.0% to 3.3%) | 4 (2.6%: 0.9% to 6.7%) | ||
| Asphyxiation/drowning | 16 (0.7%: 0.4% to 1.1%) | 3 (1.9%: 0.6% to 5.9%) | ||
| Cause of injury | N (%: 95% CI) | <0.001 | ||
| Motor vehicle | 537 (23.7%: 22.0% to 25.5%) | 30 (19.3%: 13.9% to 26.4%) | ||
| Motorcycle | 229 (10.1%: 8.9% to 11.4%) | 19 (12.3%: 7.9% to 18.4%) | ||
| Pedal cyclist/pedestrian | 247 (10.9%: 9.7% to 12.2%) | 10 (6.4%: 3.5% to 11.6%) | ||
| Low fall (from standing or <1m) | 526 (23.2%: 21.5% to 25.0%) | 20 (12.9%: 8.5% to 19.2%) | ||
| High fall (>1m) | 282 (12.4%: 11.1% to 13.9%) | 19 (12.3%: 7.9% to 18.4%) | ||
| Struck by/collision | 192 (8.5%: 7.4% to 9.7%) | 27 (17.4%: 12.2% to 24.2%) | ||
| Other | 256 (11.3%: 10.0% to 12.7%) | 30 (19.4%: 13.9% to 26.4%) | ||
| Injury intentd | N (%: 95% CI) | <0.001 | ||
| Unintentional | 2,035 (90.5%: 89.2% to 91.7%) | 107 (71.8%: 64.0% to 78.5%) | ||
| Intentional | 213 (9.5%: 8.3% to 10.8%) | 42 (28.2%: 21.5% to 36.0%) | ||
| Injury Severity Score | N (%: 95% CI) | 0.04 | ||
| <14 | 505 (22.3%: 20.6% to 24.0%) | 49 (31.6%: 24.8% to 39.4%) | ||
| 14–16 | 462 (20.4%: 18.8% to 22.1%) | 32 (20.7%: 15.0% to 27.8%) | ||
| 17–21 | 580 (25.6%: 23.8% to 27.4%) | 37 (23.9%: 17.8% to 31.2%) | ||
| 22+ | 720 (31.8%: 29.9% to 33.7%) | 37 (23.9%: 17.8% to 31.2%) | ||
| Nature of injury | N (%: 95% CI) | 0.001 | ||
| Isolated head injury | 341 (15.0%: 13.6% to 16.6%) | 16 (10.3%: 6.4% to 16.2%) | ||
| Head and other injuries | 517 (22.8%: 21.1% to 24.6%) | 30 (19.3%: 13.9% to 26.4%) | ||
| Spinal cord injury | 66 (2.9%: 2.3% to 3.7%) | 1 (0.7%: 0.1% to 4.5%) | ||
| Orthopaedic injuries only | 217 (9.6%: 8.4% to 10.8%) | 19 (12.3%: 7.9% to 18.4%) | ||
| Chest/abdominal injuries alone | 145 (6.4%: 5.5% to 7.5%) | 20 (12.9%: 8.5% to 19.2%) | ||
| Chest/abdominal and other injuries | 636 (28.0%: 26.2% to 29.9%) | 34 (21.9%: 16.1% to 29.2%) | ||
| Other multitrauma and burns | 347 (15.3%: 13.9% to 16.8%) | 35 (22.6%: 16.7% to 29.9%) | ||
| Level of definitive care | N (%: 95% CI) | 0.55 | ||
| Major trauma service | 1,860 (82.0%: 80.3% to 83.5%) | 130 (83.9%: 77.2% to 88.9%) | ||
| Nonmajor trauma service | 409 (18.0%: 16.5% to 19.7%) | 25 (16.1%: 11.1% to 22.8%) | ||
a n = 17 missing
b n = 69 missing
c n = 77 missing
d n = 27 missing, intentional includes intentional self-harm and interpersonal violence.
CI, confidence intervals; IRSAD, Index of Relative Socioeconomic Advantage and Disadvantage.