Table.
Patient characteristics and unadjusted outcomes for patients with stroke, lower extremity fracture and lower extremity replacement: total samples and by diagnosis-specific volume quintiles.
| Facility Volume Quintiles [range] | ||||||
|---|---|---|---|---|---|---|
| Stroke | Total | Q1 [< 52] | Q2 [52–79] | Q3 [80–112] | Q4 [113–164] | Q5 [> 164] |
| Facilities, N | 717 | 140 | 148 | 142 | 143 | 144 |
| Patients, N | 202,423 | 12,867 | 23,621 | 34,542 | 47,826 | 83,567 |
| Annual volume | 112.9 (78.5) | 36.2 (10.5) | 63.0 (8.1) | 95.4 (10.0) | 133.1 (14.3) | 236.0 (77.9) |
| Age, yrs | 71.5 (11.9) | 73.2 (11.6) | 72.5 (11.7) | 71.7 (12.0) | 71.3 (12.0) | 71.0 (12.0) |
| Women | 51.8% | 53.8% | 51.7% | 52.4% | 51.3% | 51.5% |
| White | 73.2% | 83.9% | 79.3% | 70.0% | 72.8% | 71.3% |
| Comorbid sum, 0–10 | 8.0 (2.5) | 8.0 (2.5) | 8.0 (2.5) | 7.8 (2.6) | 7.9 (2.5) | 8.1 (2.3) |
| Onset to admit, days | 8.5 (8.3) | 7.5 (7.7) | 7.7 (7.5) | 8.1 (8.1) | 8.3 (8.1) | 9.1 (8.8) |
| Admission FIM | 55.1 (19.1) | 58.7 (19.3) | 58.5 (18.7) | 57.6 (18.9) | 55.8 (19.1) | 52.1 (18.9) |
| Discharge FIM | 80.1 (23.7) | 82.8 (23.7) | 82.1 (23.3) | 82.0 (23.2) | 80.7 (23.5) | 78.1 (24.0) |
| FIM change | 25.0 (14.8) | 24.0 (14.8) | 23.6 (14.7) | 24.3 (14.6) | 24.9 (14.8) | 25.9 (15.0) |
| Length of stay, days | 16.7 (8.9) | 15.3 (8.6) | 15.8 (8.4) | 16.1 (8.8) | 16.3 (8.7) | 17.6 (9.1) |
| Discharged home | 67.4% | 68.0% | 67.1% | 68.1% | 68.4% | 66.5% |
| Fracture | Total | Q1 [< 27] | Q2 [27–44] | Q3 [45–66] | Q4 [67–104] | Q5 [> 104] |
| Facilities, N | 713 | 147 | 145 | 140 | 141 | 141 |
| Patients, N | 132,194 | 5,609 | 14,128 | 20,778 | 32,168 | 59,511 |
| Annual volume | 68.8 (53.9) | 14.8 (7.8) | 36.5 (5.2) | 55.3 (6.5) | 84.0 (10.9) | 157.3 (46.5) |
| Age, yrs | 78.4 (10.4) | 76.3 (11.7) | 77.8 (10.7) | 78.3 (10.3) | 78.4 (10.4) | 78.9 (10.1) |
| Women | 72.1% | 67.6% | 70.5% | 71.6% | 72.4% | 72.9% |
| White | 88.0% | 86.7% | 86.2% | 89.7% | 87.9% | 88.0% |
| Comorbid sum, 0–10 | 7.8 (2.5) | 7.4 (2.7) | 7.6 (2.6) | 7.5 (2.7) | 7.9 (2.5) | 8.0 (2.3) |
| Onset to admit, days | 6.3 (5.4) | 7.0 (6.4) | 6.3 (5.4) | 6.1 (5.1) | 6.1 (5.0) | 6.4 (5.5) |
| Admission FIM | 60.5 (15.5) | 66.4 (14.4) | 65.8 (14.8) | 64.1 (14.3) | 61.2 (15.2) | 57.0 (15.5) |
| Discharge FIM | 86.9 (19.1) | 90.6 (17.7) | 90.4 (18.2) | 88.4 (18.3) | 86.6 (19.1) | 85.4 (19.5) |
| FIM change | 26.5 (13.4) | 24.2 (12.5) | 24.6 (12.4) | 24.4 (12.7) | 25.4 (13.1) | 28.4 (13.9) |
| Length of stay, days | 13.4 (5.3) | 12.1 (5.7) | 12.0 (5.0) | 12.7 (5.2) | 13.5 (5.2) | 14.1 (5.3) |
| Discharged home | 67.3% | 73.1% | 71.6% | 68.7% | 66.3% | 65.9% |
| Joint Replacement | Total | Q1 [< 20] | Q2 [20–37] | Q3 [38–63] | Q4 [64–118] | Q5 [> 118] |
| Facilities, N | 712 | 147 | 142 | 140 | 142 | 141 |
| Patients, N | 148,068 | 4,326 | 10,985 | 18,795 | 34,131 | 79,831 |
| Annual volume | 75.5 (85.3) | 10.9 (5.5) | 28.0 (4.9) | 49.5 (7.3) | 86.2 (15.1) | 206.0 (109.6) |
| Age, yrs | 70.5 (10.4) | 70.0 (11.1) | 70.9 (10.8) | 70.9 (10.7) | 70.8 (10.3) | 70.2 (10.2) |
| Women | 68.3% | 65.9% | 67.7% | 68.7% | 69.2% | 68.1% |
| White | 83.4% | 81.0% | 84.7% | 82.3% | 82.8% | 83.8% |
| Comorbid sum, 0–10 | 6.9 (2.7) | 6.7 (2.8) | 6.9 (2.7) | 6.8 (2.7) | 7.0 (2.7) | 7.0 (2.6) |
| Onset to admit, days | 4.3 (3.6) | 5.0 (4.9) | 4.6 (4.1) | 4.6 (3.9) | 4.3 (3.8) | 4.2 (3.4) |
| Admission FIM | 73.2 (12.7) | 75.6 (12.9) | 75.7 (12.3) | 74.7 (12.4) | 74.5 (12.4) | 71.8 (12.7) |
| Discharge FIM | 102.2 (11.9) | 101.1 (12.9) | 102.0 (12.0) | 101.6 (12.1) | 101.7 (11.8) | 102.6 (11.7) |
| FIM change | 29.0 (11.7) | 25.6 (11.0) | 26.3 (10.7) | 26.9 (11.0) | 27.3 (11.1) | 30.8 (12.0) |
| Length of stay, days | 9.2 (3.9) | 9.2 (4.4) | 8.9 (4.1) | 9.3 (4.1) | 9.0 (3.9) | 9.3 (3.8) |
| Discharged home | 92.0% | 91.2% | 91.3% | 91.1% | 92.6% | 92.2% |
Values reported are mean (sd) or column percentages. Differences between quintile groups tested with one-way ANOVA or chi-square tests: p < .01 for all comparisons. Volume ranges defining quintiles are noted in [brackets] within the diagnostic-specific column-header rows.