Table 2.
Baseline demographics and outcomes, stratified by weekend vs. weekday admission
| Variable | Full cohort (n=6,052) | Weekend admission (n=1,660) | Weekday admission (n=4,392) | p value* |
|---|---|---|---|---|
|
| ||||
| Age in years | 68.7±14.8 | 68.9±14.9 | 68.7±14.7 | 0.611 |
|
| ||||
| Female sex | 3,077 (50.8%) | 866 (52.2%) | 2,211 (50.3%) | 0.205 |
|
| ||||
| Race | 0.443 | |||
| White | 4,084 (67.5%) | 1,100 (66.3%) | 2,984 (67.9%) | |
| Black | 854 (14.1%) | 250 (15.1%) | 604 (13.8%) | |
| Hispanic | 457 (7.5%) | 133 (8.0%) | 324 (7.4%) | |
| Other or unknown | 657 (10.9%) | 177 (10.6%) | 480 (10.9%) | |
|
| ||||
| NIHSS | 16, 10–21 | 16, 11–22 | 16, 10–21 | 0.057 |
|
| ||||
| Elixhauser comorbidity index | 5, 4–6 | 5, 4–6 | 5, 4–6 | 0.764 |
|
| ||||
| APR-DRG severity of illness | 3, 3–4 | 3, 3–4 | 3, 3–4 | 0.535 |
|
| ||||
| Number of ICD-10 diagnoses | 18.7±6.0 | 18.7±5.9 | 18.7±6.0 | 0.867 |
|
| ||||
| Hospital census region | 0.303 | |||
| Northeast | 1,117 (18.5%) | 282 (17.0%) | 835 (19.0%) | |
| Midwest | 1,341 (22.1%) | 369 (22.2%) | 972 (22.1%) | |
| South | 2,414 (39.9%) | 672 (40.5%) | 1,742 (39.7%) | |
| West | 1,180 (19.5%) | 337 (20.3%) | 843 (19.2%) | |
|
| ||||
| Admitted to a teaching hospital | 5,564 (91.9%) | 1,522 (91.7%) | 4,042 (92.0%) | 0.599 |
|
| ||||
| Payer | 0.593 | |||
| Medicare | 3,719 (61.5%) | 1,037 (62.5%) | 2,682 (61.1%) | |
| Medicaid | 570 (9.4%) | 157 (9.5%) | 413 (9.4%) | |
| Private insurance | 1,392 (23.0%) | 374 (22.5%) | 1,018 (23.2%) | |
| Self-pay or other | 371 (6.1%) | 92 (5.5%) | 279 (6.3%) | |
|
| ||||
| Quartile of median household income by zip code | 0.125 | |||
| 1st quartile | 1,730 (28.6%) | 451 (27.2%) | 1,279 (29.1%) | |
| 2nd quartile | 1,551 (25.6%) | 438 (26.4%) | 1,113 (25.3%) | |
| 3rd quartile | 1,493 (24.7%) | 437 (26.3%) | 1,056 (24.0%) | |
| 4th quartile | 1,278 (21.1%) | 334 (20.1%) | 944 (21.5%) | |
|
| ||||
| Intravenous alteplase | 1,463 (24.2%) | 403 (24.3%) | 1,060 (24.1%) | 0.908 |
|
| ||||
| Mechanical ventilation required | 916 (15.1%) | 251 (15.1%) | 665 (15.1%) | 0.984 |
|
| ||||
| Total hospital charges (n=6,022) | 184,143±145,972 | 183,430±142,604 | 184,413±147,241 | 0.816 |
|
| ||||
| Cost-to-charge ratio (n=6,022) | 41,031±27,006 | 41,129±26,326 | 40,994±27,261 | 0.862 |
|
| ||||
| In-hospital death | 707 (11.7%) | 183 (11.0%) | 524 (11.9%) | 0.327 |
|
| ||||
| Favorable discharge | 1,255 (20.7%) | 334 (20.1%) | 921 (21.0%) | 0.467 |
|
| ||||
| Length of stay ≥10 days | 1,247 (20.6%) | 349 (21.0%) | 898 (20.5%) | 0.620 |
*
Binary variables presented as n (%); ordinal variables as median, IQR; interval variables as mean±standard deviation. P values calculated with the chi-squared test for binary variables, the Wilcoxon rank sum test for ordinal variables, and Student’s t-test for interval variables.
NIHSS, National Institutes of Health Stroke Scale; APR-DRG, All Patients Refined Diagnosis Related Groups; ICD-10, International Classification of Diseases, 10th Revision