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Table 2 Characteristics of patients admitted to the matched reporting and non-reporting hospitals

From: Hospital quality reporting and improvement in quality of care for patients with acute myocardial infarction

Patient characteristic Year 0 Year 1 Year 2 All
Reporting, n (%)
(N = 6919)
Non-reporting, n (%)
(N = 6170)
SD Reporting, n (%)
(N = 5267)
Non-reporting, n (%)
(N = 5115)
SD Reporting, n (%)
(N = 2345)
Non-reporting, n (%)
(N = 2352)
SD Reporting, n (%)
(N = 14,531)
Non-reporting, n (%)
(N = 13,637)
SD
Sex
 Male 5044 (72.9) 4440 (72.0) 2.1 3922 (74.5) 3709 (72.5) 4.4 1681 (71.7) 1685 (71.6) 0.1 10,647 (73.3) 9834 (72.1) 2.6
 Female 1875 (27.1) 1730 (28.0) −2.1 1345 (25.5) 1406 (27.5) −4.4 664 (28.3) 667 (28.4) −0.1 3884 (26.7) 3803 (27.9) − 2.6
Age, years
 18–64 2456 (35.5) 2097 (34.0) 3.2 1871 (35.5) 1710 (33.4) 4.4 768 (32.8) 819 (34.8) −4.4 5095 (35.1) 4626 (33.9) 2.4
 65–74 1822 (26.3) 1615 (26.2) 0.4 1389 (26.4) 1390 (27.2) −1.8 626 (26.7) 637 (27.1) −0.9 3837 (26.4) 3642 (26.7) −0.7
 75–84 1760 (25.4) 1633 (26.5) − 2.3 1362 (25.9) 1323 (25.9) 0.0 652 (27.8) 579 (24.6) 7.3 3774 (26.0) 3535 (25.9) 0.1
  ≥ 85 881 (12.7) 825 (13.4) −1.9 645 (12.2) 692 (13.5) −3.8 299 (12.8) 317 (13.5) −2.2 1825 (12.6) 1834 (13.4) −2.6
Killip class
 Class 1 2878 (41.6) 2683 (43.5) −3.8 2120 (40.3) 2300 (45.0) −9.5 895 (38.2) 1082 (46.0) −15.9 5893 (40.6) 6065 (44.5) −7.9
 Class 2 1937 (28.0) 1727 (28.0) 0.0 1531 (29.1) 1347(26.3) 6.1 730 (31.1) 649 (27.6) 7.8 4198 (28.9) 3723 (27.3) 3.5
 Class 3 671 (9.7) 550 (8.9) 2.7 438 (8.3) 439 (8.6) −1.0 198 (8.4) 185 (7.9) 2.1 1307 (9.0) 1174 (8.6) 1.4
 Class 4 878 (12.7) 816 (13.2) −1.6 700 (13.3) 661 (12.9) 1.1 298 (12.7) 300 (12.8) −0.1 1876 (12.9) 1777 (13.0) − 0.4
 Missing 555 (8.0) 394 (6.4) 6.3 478 (9.1) 368 (7.2) 6.9 224 (9.6) 136 (5.8) 14.2 1257 (8.7) 898 (6.6) 7.8
  1. Abbreviation: SD standardized difference
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