Table 3.
Number of hospitals or providers and missed quality measures per quartile of patient volume
| Number of patients |
Number of hospitals or surgeons |
Median volume (25th-75th interquartile range) |
Number of deaths (%) |
Number of readmissions (%) |
Mean number of missed quality measures (standard deviation)* |
|
|---|---|---|---|---|---|---|
| Hospital annual | ||||||
| volume | ||||||
| 1st quartile (lowest volume) | 20358 | 85 | 142 (104, 175) | 489 (2.4%) | 2311 (11.4%) | 2.29 (1.40) |
| 2nd quartile | 20089 | 40 | 244 (217, 266) | 392 (2.0%) | 2179 (10.9%) | 2.21 (1.35) |
| 3rd quartile | 20491 | 26 | 373 (340, 423) | 487 (2.4%) | 2307 (11.3%) | 2.11 (1.27) |
| 4th quartile (highest volume) | 20351 | 13 | 744 (548, 1166) | 457 (2.3%) | 1856 (9.1%) | 2.56 (1.53) |
| Surgeon annual | ||||||
| volume | ||||||
| 1st quartile (lowest volume) | 20331 | 1143 | 40 (24, 53) | 534 (2.6%) | 2208 (10.9%) | 2.24 (1.41) |
| 2nd quartile | 20350 | 150 | 77 (71, 86) | 457 (2.3%) | 2193 (10.8%) | 2.18 (1.42) |
| 3rd quartile | 20402 | 96 | 108 (101, 117) | 414 (2.0%) | 2180 (10.7%) | 2.37 (1.36) |
| 4th quartile (highest volume) | 20206 | 62 | 158 (142, 193) | 420 (2.1%) | 2072 (10.3%) | 2.40 (1.40) |
P for trend in number of missed quality measures <0.0001 for both hospital and surgeon annual volume.