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. 2016 May 11;5(1):36–42. doi: 10.1093/gastro/gow015

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