Table 3.

The Percentage Of Elevation In Daily Mortality Rates At Various Time Points Relative To The Rate At One Year Post-Admission For Injured Medicare Patients.

	30 days	60 days	90 days	180 days
Overall (n=32,135)	24.7%	11.2%	4.8%	0.7%
ICISS ≤ 0.9* (n=1,607)	22.3%	2.3%	1.8%	0%
Charlson ≥3† (n=4,414)	23.6%	12.5%	6.7%	3.2%
SNF resident prior to Injury‡ (n=1,421)	52.3%	16.3%	9.9%	5.1%
Hip Fracture (n=11,738)	31.2%	12.2%	5.9%	0%

$$\text{Percentages}=100\times \frac{\mathit{\text{mortality rate at timepoint}}-\mathit{\text{rate at day}}365}{\mathit{\text{mortality rate at day}}0-\mathit{\text{rate at day}}365}$$

^*Seriously injured subgroup, defined by ICD-9 based Injury Severity Score (ICISS) ≤ 0.9.

^†High co-morbidity subgroup, defined by a Charlson co-morbidity score ≥3.

^‡Skilled nursing facility (SNF) residents prior to injury.