Patient and hospital characteristics for single treated cerebral aneurysms, 2007–2016
| Unruptured aneurysms | P value | Ruptured aneurysms | P value | |||
| Surgical (n=7847) | Endovascular (n=12 797) | Surgical (n=8108) | Endovascular (n=10 530) | |||
| Age (years) (mean±SD) | 55.3±11.7 | 57.8±13.1 | <0.001 | 53.7±13.4 | 54.8±16.0 | <0.001 |
| Sex (n (%)) | ||||||
| Female | 5796 (74.0) | 9727 (76.3) | <0.001 | 5597 (69.0) | 6841 (65.1) | <0.001 |
| Male | 2038 (26.0) | 3026 (23.7) | 2509 (31.0) | 3674 (34.9) | ||
| Race (n (%)) | ||||||
| White | 4865 (71.4) | 7926 (70.5) | <0.001 | 3965 (57.3) | 5442 (59.7) | 0.001 |
| Black | 836 (12.3) | 1322 (11.8) | 1153 (16.7) | 1458 (16.0) | ||
| Hispanic | 686 (10.1) | 1179 (10.5) | 1057 (15.3) | 1260 (13.8) | ||
| Asian or Pacific Islander | 133 (2.0) | 305 (2.7) | 315 (4.5) | 462 (5.1) | ||
| Native American | 63 (0.9) | 57 (0.5) | 54 (0.8) | 43 (0.5) | ||
| Other | 233 (3.4) | 454 (4.0) | 380 (5.5) | 443 (4.9) | ||
| Healthcare coverage (n (%)) | ||||||
| Private insurance | 3878 (49.5) | 5569 (43.6) | <0.001 | 3482 (43.0) | 4368 (41.6) | <0.001 |
| Medicaid | 1071 (13.7) | 1501 (11.7) | 1507 (18.6) | 1751 (16.7) | ||
| Medicare | 2241 (28.6) | 4798 (37.5) | 1781 (22.0) | 2965 (28.2) | ||
| Self-pay | 266 (3.4) | 358 (2.8) | 890 (11.0) | 885 (8.4) | ||
| No charge | 46 (0.6) | 60 (0.5) | 72 (0.9) | 118 (1.1) | ||
| Other | 334 (4.3) | 492 (3.9) | 364 (4.5) | 415 (4.0) | ||
| Income quartile (n (%)) | ||||||
| 0 to 25th percentile | 1952 (25.5) | 3256 (26.0) | <0.001 | 2393 (30.3) | 2962 (28.8) | <0.001 |
| 26th to 50th percentile | 2067 (27.0) | 3146 (25.1) | 2058 (26.0) | 2621 (25.5) | ||
| 51st to 75th percentile | 1965 (25.6) | 3058 (24.4) | 1909 (24.2) | 2382 (23.2) | ||
| 76th to 100th percentile | 1684 (22.0) | 3080 (24.6) | 1543 (19.5) | 2304 (22.4) | ||
| Admission type (n (%)) | ||||||
| Non-elective admission | 1088 (13.9) | 2757 (21.6) | <0.001 | 7357 (91.0) | 9428 (89.7) | 0.004 |
| Elective admission | 6744 (86.1) | 9989 (78.4) | 728 (9.0) | 1079 (10.3) | ||
| Elixhauser comorbidity score (points) (mean±SD)* | 1.28±4.19 | 1.03±3.90 | <0.001 | 4.04±5.95 | 4.45±6.28 | <0.001 |
| Hospital region (n) (mean±SD) | ||||||
| Northeast | 154.0±21.9 | 248.2±102.8 | 0.052 | 125.7±27.0 | 197.3±90.9 | 0.09 |
| Midwest | 194.3±24.0 | 292.0±81.6 | 0.04 | 182.3±42.7 | 221.0±65.0 | 0.84 |
| West | 177.9±28.2 | 257.8±94.7 | 0.14 | 217.2±59.9 | 241.4±72.2 | >0.99 |
| South | 258.5±53.6 | 480.7±155.8 | <0.001 | 285.6±54.3 | 393.3±102.9 | 0.003 |
| Location/teaching status of hospital (n) (mean±SD) | ||||||
| Rural | 9.7±12.4 | 7.2±8.9 | >0.99 | 7.7±9.5 | 7.5±7.2 | >0.99 |
| Urban non-teaching | 54.7±20.5 | 112.0±36.0 | >0.99 | 77.3±34.9 | 93.6±26.7 | >0.99 |
| Urban teaching | 714.0±83.9 | 1154.5±372.5 | <0.001 | 713.4±115.2 | 942.5±263.6 | <0.001 |
| Hospital bed size (n) (mean±SD) | ||||||
| Small | 48.1±20.0 | 48.4±27.1 | >0.99 | 31.3±14.6 | 43.3±30.4 | >0.99 |
| Medium | 108.4±11.0 | 188.9±75.7 | 0.57 | 113.6±16.7 | 140.6±56.9 | >0.99 |
| Large | 621.9±102.4 | 1036.4±306.1 | <0.001 | 653.5±136.0 | 860.7±223.1 | <0.001 |
| Inhospital mortality rate (%) (mean±SD) | 0.4±0.3 | 0.4±0.3 | 0.90 | 11.3±0.7 | 12.9±1.6 | 0.01 |
| Length of stay (days) (mean±SD) | 5.8±5.8 | 2.8±5.4 | <0.001 | 19.1±14.1 | 17.9±14.8 | <0.001 |
| Total charges (US$) (mean±SD) | 108 240.79± 89 794.57 | 108 405.75± 90 653.05 | 0.90 | 299 852.92± 247 929.38 | 311 305.00± 258 494.88 | 0.003 |
*Elixhauser comorbidity scores were not calculated from October 1, 2015 to December 31, 2016 because the National Inpatient Sample databases did not provide the 29 Elixhauser comorbidity indicators.