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. 2018 Nov 25;8(11):e022090. doi: 10.1136/bmjopen-2018-022090

Table 1.

Descriptive statistics at the individual, hospital and neighbourhood levels

Individual (n=404 675)
Mean (SD) or %
Hospital (n=66)
Median (IQR)
Neighbourhood (n=214)
Median (IQR)
Individuals (n) 2845 (349–9683) 1630 (765–2879)
Age 60.4 (23.7) 62.0 (53.2–66.6) 60.8 (57.3–65.2)
Female 49.8% 50.6% (40.1%–56.7%) 50.5% (46.3%–54.2%)
Race
 White 70.0% 74.6% (40.6%–91.0%) 70.8% (45.5%–82.4%)
 Black 26.0% 7.6% (2.2%–19.3%) 2.3% (0.9%–10.0%)
 Other 4.0% 8.2% (3.6%–23.2%) 17.2% (12.0%–30.7%)
Mechanism
 Falls 44.3% 43.7% (26.9%–54.1%) 46.7% (40.4%–52.2%)
 Firearms 2.4% 0.4% (0.04%–1.1%) 0.6% (0.2%–1.4%)
 Motor vehicle 8.6% 5.4% (2.8%–12.1%) 8.4% (7.0%–10.4%)
Severity 4.9 (5.4) 4.5 (3.5–5.5) 5.0 (4.7–5.2)
Comorbidities 2.7 (2.0) 2.8 (2.0–3.1) 2.7 (2.5–2.8)
Mortality 2.5% 2.2% (1.6%–3.0%) 2.4% (2.0%–2.7%)
Length of stay 6.4 (8.3) 5.9 (5.2–6.7) 6.3 (5.9–6.7)
Charges (thousands of dollars) 36.3 (55.2) 32.5 (25.5–41.2) 36.9 (33.7–39.5)
Poverty rate 17.4 (14.4) 14.5 (11.8–19.9) 10.7 (6.5–18.7)