Table 1.
Number and frequency of discharges with acute cholecystitis (AC) by patient and hospital characteristics in 1997 and 2012
| Category | Categorical variable | AC in 1997, N (%) | AC in 2012, N (%) | Total admissions in 1997, N (%) | Total admissions in 2012, N (%) | AC per 10 000 admissions in 1997 | AC per 10 000 admissions in 2012 |
|---|---|---|---|---|---|---|---|
| All discharges | 149 661 (100) | 215 995 (100) | 33 230 554 (100) | 28 391 049 (100) | 45.04 | 76.08 | |
| Age group (y) | 1–17 | 1251 (1) | 2130 (1) | 1 766 699 (5) | 1 376 026 (5) | 7.08 | 15.48 |
| 18–44 | 45 229 (30) | 73 150 (34) | 9 074 102 (27) | 4943137 (17) | 49.84 | 147.98 | |
| 45–64 | 45 117 (30) | 69 995 (32) | 6 266 540 (19) | 9 003 812 (32) | 72 | 77.74 | |
| 65–84 | 50 254 (34) | 58 265 (27) | 9 644 446 (29) | 9 724 120 (34) | 52.11 | 59.92 | |
| 85+ | 7806 (5) | 12 430 (6) | 2 245 807(7) | 2 980 584 (11) | 34.76 | 41.7 | |
| Sex | Male | 55 878 (37) | 87 065 (40) | 13 632 763 (41) | 13 4189 72 (47) | 40.99 | 64.88 |
| Female | 93 771(63) | 128 910 (60) | 19 593 669 (59) | 14 969 687 (53) | 47.86 | 86.11 | |
| Payer | Medicare | 55 347 (37) | 73 880 (34) | 12 070 265 (36) | 14 227 410 (50) | 45.85 | 51.93 |
| Medicaid | 13 418 (9) | 31 040 (14) | 5 448 491 (16) | 3 926 823 (14) | 24.63 | 79.05 | |
| Private insurance | 65 246 (44) | 75 080 (35) | 12 814 864 (39) | 7 360 684 (26) | 50.91 | 102 | |
| Uninsured | 10 130 (7) | 27 180 (13) | 1 615 542 (5) | 1 779 681 (6) | 62.7 | 152.72 | |
| Other | 4974 (3) | 8305 (4) | 1 201 195 (4) | 1 026 506 (4) | 41.41 | 80.91 | |
| Median income for zip code | Low | – | 61 170 (28) | – | 8 646 773 (30) | – | 70.74 |
| Not low | – | 150 360 (70) | – | 19 070 345 (67) | – | 78.84 | |
| Hospital owner | Government | 20 840 (14) | 25 675 (12) | 4 707 979 (14) | 3 390 284 (12) | 44.27 | 75.73 |
| Private, not-for-profit | 104 754 (70) | 154 070 (71) | 23 924 271 (72) | 20 916 148 (74) | 43.79 | 73.66 | |
| Private, for-profit | 23 568 (16) | 36 250 (17) | 4 464 111 (13) | 4 084 618 (14) | 52.79 | 88.75 | |
| Location | Non-metropolitan | 32 079 (21) | 26 950 (12) | 5 165 442 (16) | 3 273 738 (12) | 62.1 | 82.32 |
| Metropolitan | 117 083 (78) | 189 045 (88) | 27 930 919 (84) | 25 117 311 (88) | 41.92 | 75.26 | |
| Bed-size | Small | 27 413 (18) | 32 350 (15) | 5 284 288 (16) | 4 118 586 (15) | 51.88 | 78.55 |
| Medium | 51 986 (35) | 60 165 (28) | 11 047 425 (33) | 7 416 819 (26) | 47.06 | 81.12 | |
| Large | 69 764 (47) | 123 480 (57) | 16 764 648 (51) | 16 855 643 (59) | 41.61 | 73.26 | |
| Region | Northeast | 30 720 (21) | 42 855 (20) | 6 784 405 (20) | 5 652 002 (20) | 45.28 | 75.82 |
| Midwest | 31 899 (21) | 39 860 (18.5) | 7 740 346 (23) | 6 525 448 (23) | 41.21 | 61.08 | |
| South | 58 828 (39) | 80 500 (37) | 12 373 424 (37) | 11 019 844 (39) | 47.54 | 73.05 | |
| West | 28 214 (19) | 52 780 (24.5) | 6 332 379 (19) | 5 193 755 (18) | 44.56 | 101.62 |