Table 2. Characteristics of Hospitals in the 2003-2011 NIS Performing Pancreatic Resections and Hepatic Resectionsa.
| Characteristic | Surgical Group by Hospital Market Concentration | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pancreatic Resection | Hepatic Resection | ||||||||||
| Unconcentrated (n = 26 407) |
Moderate (n = 5297) |
High (n = 7007) |
Total (N = 38 711) |
P Value | Unconcentrated (n = 38 624) |
Moderate (n = 6007) |
High (n = 7653) |
Total (N = 52 284) |
P Value | ||
| Hospital region | |||||||||||
| Northeast | 1780 (60) | 247 (8.3) | 942 (31.7) | 2969 | .11 | 1923 (51.7) | 503 (13.5) | 1293 (34.8) | 3719 | .005 | |
| Midwest | 7423 (72.4) | 936 (9.1) | 1894 (18.5) | 10 252 | 10 921 (78.7) | 1012 (7.3) | 1944 (14.0) | 13 877 | |||
| South | 9188 (62.8) | 2535 (17.3) | 2917 (19.9) | 14 639 | 12 851 (68.5) | 2953 (15.7) | 2962 (15.8) | 18 766 | |||
| West | 8016 (73.9) | 1580 (14.6) | 1254 (11.6) | 10 851 | 12 928 (81.2) | 1539 (9.7) | 1454 (9.1) | 15 921 | |||
| Hospital volume | |||||||||||
| Low | 3605 (32) | 2917 (25.9) | 4739 (42.1) | 11 261 | <.001 | 3625 (34.2) | 2511 (23.7) | 4475 (42.2) | 10611 | <.001 | |
| High | 22 802 (83.1) | 2380 (8.7) | 2268 (8.3) | 27 450 | 34 999 (84.0) | 3497 (8.4) | 3177 (7.6) | 41673 | |||
| Hospital bed size | |||||||||||
| Small | 1648 (68.9) | 324 (13.6) | 419 (17.5) | 2391 | .007 | 3194 (73.9) | 523 (12.1) | 605 (14.0) | 4322 | .06 | |
| Medium | 2647 (50.4) | 973 (18.5) | 1635 (31.1) | 5254 | 4618 (60.7) | 1188 (15.6) | 1802 (23.7) | 7608 | |||
| Large | 22 111 (71.2) | 4000 (12.9) | 4954 (15.9) | 31 065 | 30 812 (76.4) | 4296 (10.6) | 5246 (13) | 40 354 | |||
| Teaching status | |||||||||||
| Nonteaching | 1705 (28.6) | 1167 (19.6) | 3088 (51.8) | 5960 | <.001 | 3126 (42.9) | 1122 (15.4) | 3037 (41.7) | 7286 | <.001 | |
| Teaching | 24 702 (75.4) | 4130 (12.6) | 3920 (12.0) | 32 751 | 35 498 (78.9) | 4885 (10.9) | 4615 (10.3) | 44 998 | |||
| Total hospital costs, median (IQR), $ | 30 998 (23 250-45 533) |
32 463 (23 254-46 579) |
29 902 (22 068-45 195) |
31 033 (22 995-45 636) |
NA | 21 651 (15 870-30 563) |
17 938 (13 024-26 076) |
17 959 (12 575-27 183) |
20 734 (14 908-29 699) |
NA | |
| Total hospital charges, median (IQR), $ | 89 919 (64 518-144 465) |
101 580 (69 272-162 866) |
85 886 (59 550-149 160) |
90 989 (63 785-147 517) |
NA | 62 439 (43 113-97 890) |
55 219 (37 288-87 036) |
51 942 (34 895-81 285) |
60 394 (40 965-94 139) |
NA | |
Abbreviations: IQR, interquartile range; NA, not applicable; NIS, Nationwide Inpatient Sample.
a
Unless otherwise indicated, data are expressed as weighted number (percentage) of row totals for each surgical group. Estimated counts were rounded to the nearest unit, and thus, totals across categories may differ from the calculated sums. P values are calculated using an unpaired t test or nonparametric Kruskal-Wallis test for continuous variables and the Pearson χ2 test or Fisher exact test for categorical variables.