Hospital characteristic | All hospitals | Matched hospitals | ||||
---|---|---|---|---|---|---|
Reporting, n (%) (N = 146) | Non-reporting, n (%) (N = 327) | Standardized difference | Reporting, n (%) (N = 135) | Non-reporting, n (%) (N = 135) | Standardized difference | |
Geographical region | ||||||
Hokkaido and Tohoku | 12 (8.2) | 55 (16.8) | −26.2 | 12 (8.9) | 15 (11.1) | −7.4 |
Kanto | 31 (21.2) | 87 (26.6) | −12.6 | 31 (23.0) | 28 (20.7) | 5.4 |
Chubu | 26 (17.8) | 55 (16.8) | 2.6 | 24 (17.8) | 23 (17.0) | 2.0 |
Kansai | 37 (25.3) | 50 (15.3) | 25.2 | 31 (23.0) | 31 (23.0) | 0.0 |
Chugoku and Shikoku | 14 (9.6) | 22 (6.7) | 10.5 | 12 (8.9) | 11 (8.1) | 2.7 |
Kyushu | 26 (17.8) | 58 (17.7) | 0.2 | 25 (18.5) | 27 (20.0) | −3.8 |
DPC category 2 hospital | 25 (17.1) | 42 (12.8) | 12.0 | 20 (14.8) | 21 (15.6) | −2.1 |
Number of acute-care beds | ||||||
< 300 | 31 (21.2) | 89 (27.2) | −14.0 | 31 (23.0) | 36 (26.7) | −8.6 |
300–399 | 37 (25.3) | 92 (28.1) | −6.3 | 34 (25.2) | 33 (24.4) | 1.7 |
400–499 | 27 (18.5) | 58 (17.7) | 2.0 | 27 (20.0) | 24 (17.8) | 5.7 |
≥ 500 | 51 (34.9) | 88 (26.9) | 17.4 | 43 (31.9) | 42 (31.1) | 1.6 |
Annual number of hospital ambulance acceptances | ||||||
< 2000 | 30 (20.5) | 96 (29.4) | −20.5 | 30 (22.2) | 33 (24.4) | −5.3 |
2000–2999 | 34 (23.3) | 82 (25.1) | −4.2 | 32 (23.7) | 34 (25.2) | −3.4 |
3000–3999 | 25 (17.1) | 50 (15.3) | 5.0 | 22 (16.3) | 22 (16.3) | 0.0 |
≥ 4000 | 57 (39.0) | 99 (30.3) | 18.5 | 51 (37.8) | 46 (34.1) | 7.7 |
Three or more angiography systems | 37 (25.3) | 74 (22.6) | 6.4 | 35 (25.9) | 28 (20.7) | 12.3 |
Annual number of regional ambulance acceptances | ||||||
< 10,000 | 20 (13.7) | 86 (26.3) | −31.9 | 19 (14.1) | 20 (14.8) | −2.1 |
10,000–29,999 | 57 (39.0) | 105 (32.1) | 14.5 | 54 (40.0) | 55 (40.7) | −1.5 |
30,000–49,999 | 30 (20.5) | 47 (14.4) | 16.3 | 26 (19.3) | 24 (17.8) | 3.8 |
≥ 50,000 | 39 (26.7) | 89 (27.2) | −1.1 | 36 (26.7) | 36 (26.7) | 0.0 |
ICU admission of AMI patients | 73 (50.0) | 121 (37.0) | 26.4 | 65 (48.1) | 64 (47.4) | 1.5 |
Emergency center admission of AMI patients | 31 (21.2) | 44 (13.5) | 20.6 | 21 (15.6) | 28 (20.7) | −13.5 |
CABG surgery for AMI patients | 58 (39.7) | 96 (29.4) | 21.9 | 49 (36.3) | 44 (32.6) | 7.8 |
Hospital volume of AMI patients | ||||||
< 20 | 29 (19.9) | 75 (22.9) | −7.5 | 29 (21.5) | 31 (23.0) | −3.6 |
20–34 | 34 (23.3) | 83 (25.4) | −4.9 | 32 (23.7) | 28 (20.7) | 7.1 |
35–49 | 32 (21.9) | 73 (22.3) | −1.0 | 29 (21.5) | 30 (22.2) | − 1.8 |
≥ 50 | 51 (34.9) | 96 (29.4) | 12.0 | 45 (33.3) | 46 (34.1) | −1.6 |
Risk-adjusted mortality | 0.127 ± 0.068 | 0.127 ± 0.073 | 0.1 | 0.124 ± 0.066 | 0.129 ± 0.078 | −7.8 |