Table 1.
Risks of death associated with hospitalization months by older and younger cardiovascular inpatients
| Month |
≥ 65 years (n = 308,952) |
30 to < 65 years (n = 317,998) |
||||||
|---|---|---|---|---|---|---|---|---|
| No. | Death rate (%) | RRs (95% CI) * | P -value | No. | Death rate (%) | RRs (95% CI) * | P -value | |
| January |
23,912 |
5.0 |
1.49 (1.36, 1.63) |
< 0.01 |
23,244 |
1.3 |
1.06 (0.91, 1.24) |
0.43 |
| February |
23,054 |
4.6 |
1.39 (1.27, 1.52) |
< 0.01 |
22,266 |
1.3 |
1.02 (0.87, 1.20) |
0.82 |
| March |
28,587 |
3.5 |
1.06 (0.96, 1.16) |
0.24 |
30,463 |
1.0 |
0.86 (0.74, 1.01) |
0.07 |
| April |
27,745 |
3.9 |
1.18 (1.08, 1.29) |
< 0.01 |
27,770 |
1.2 |
1.01 (0.87, 1.18) |
0.91 |
| May† |
26,758 |
3.3 |
Reference |
|
27,248 |
1.2 |
Reference |
|
| June |
24,555 |
3.5 |
1.03 (0.94, 1.14) |
0.51 |
25,270 |
1.1 |
0.92 (0.78, 1.08) |
0.29 |
| July |
23,689 |
3.7 |
1.10 (1.00, 1.21) |
0.05 |
25,376 |
1.1 |
0.89 (0.76, 1.04) |
0.15 |
| August |
23,695 |
3.7 |
1.09 (0.99, 1.19) |
0.09 |
25,120 |
1.2 |
0.92 (0.78, 1.08) |
0.30 |
| September |
24,213 |
4.0 |
1.19 (1.08, 1.30) |
< 0.01 |
24,395 |
1.3 |
1.02 (0.88, 1.19) |
0.79 |
| October |
28,006 |
4.2 |
1.26 (1.15, 1.37) |
< 0.01 |
28,149 |
1.3 |
1.05 (0.90, 1.22) |
0.53 |
| November |
28,027 |
4.3 |
1.29 (1.18, 1.41) |
< 0.01 |
30,110 |
1.3 |
1.06 (0.91, 1.23) |
0.45 |
| December | 26,711 | 4.5 | 1.35 (1.24, 1.48) | < 0.01 | 28,587 | 1.2 | 0.99 (0.85, 1.15) | 0.86 |
*The rate ratios (RRs) were adjusted for gender, year, and hospital.
†Mortality rates in May were taken as the reference levels for comparison.