Table 1.
Comparing characteristics of patients undergoing primary total hip arthroplasty between octogenarians and nonagenarians. Healthcare Cost and Utilization Project—Nationwide Inpatient Sample, 2010–2014.
| Octogenarians (n = 147,281) | Nonagenarians (n = 8388) | p Value | |
|---|---|---|---|
| Age (years), mean (SD) | 83.19 (2.53) | 90.55 (1.27) | - |
| Number of Chronic Conditions, mean (SD) | 5.45 (2.55) | 5.63 (2.59) | 0.007 |
| Number of Diagnoses, mean (SD) | 8.94 (4.50) | 9.42 (4.61) | <0.001 |
| Number of Procedures, mean (SD) | 1.97 (1.10) | 2.06 (1.03) | <0.001 * |
| % Female | 66.26 | 70.27 | <0.001 |
| Race | 0.198 | ||
| % White | 91.77 | 92.56 | |
| % Black | 3.11 | 2.18 | |
| % Hispanic | 2.46 | 2.15 | |
| % Asian or Pacific Islander | 0.81 | 1.16 | |
| % Native American | 0.24 | 0.33 | |
| % Other | 1.61 | 1.62 | |
| Median Household Income (1=lowest quartile, 4 = highest quartile) | 0.095 | ||
| % 1 | 18.58 | 16.98 | |
| % 2 | 26.37 | 25.98 | |
| % 3 | 27.26 | 26.63 | |
| % 4 | 27.79 | 30.41 | |
| Charlson Comorbidity Index | 0.055 | ||
| % 4 | 53.63 | 53.65 | |
| % 5 | 24.89 | 22.85 | |
| % 6+ | 21.48 | 23.51 |
* t-test performed on log-transformed data to meet the assumption of normality.