Table 1. Study characteristics before and after propensity score matching (PSM)*.
| Variables | Before PSM | After PSM | |||||
| Aged group (n=234) | Non-aged group (n=228) | P value | Aged group (n=158) | Non-aged group (n=158) | P value | ||
| Mean±SD/n(%) | Mean±SD/ n(%) | Mean±SD/n(%) | Mean±SD/n(%) | ||||
| Gender | Male | 137(58.5) | 170(74.6) | <0.001 | 110(69.6) | 110(69.6) | 1.000 |
| Female | 97(41.5) | 58(25.4) | 48(30.4) | 48(30.4) | |||
| Stroke type | Infarction | 207(88.5) | 153(67.1) | <0.001 | 133(84.2) | 133(84.2) | 1.000 |
| Hemorrhage | 27(11.5) | 75(32.9) | 25(15.8) | 25(15.8) | |||
| DM | Yes | 85(36.3) | 66(28.9) | 0.112 | 43(27.2) | 49(31.0) | 0.536 |
| No | 149(63.7) | 162(71.1) | 115(72.8) | 109(69.0) | |||
| Hypertension | Yes | 149(63.7) | 142(62.3) | 0.831 | 97(61.4) | 100(63.3) | 0.816 |
| No | 85(36.3) | 86(37.7) | 61(38.6) | 58(36.7) | |||
| Dyslipidemia | Yes | 70(29.9) | 66(28.9) | 0.900 | 48(30.4) | 51(32.3) | 0.808 |
| No | 164(70.1) | 162(71.1) | 110(69.6) | 107(67.7) | |||
| CAD | Yes | 31(13.2) | 10(4.4) | 0.001 | 11(7.0) | 10(6.3) | 1.000 |
| No | 203(86.8) | 218(95.6) | 147(93.0) | 148(93.7) | |||
| Af | Yes | 18(7.7) | 8(3.5) | 0.080 | 5(3.2) | 6(3.8) | 1.000 |
| No | 216(92.3) | 220(96.5) | 153(96.8) | 152(96.2) | |||
| Previous CVA | Yes | 37(15.8) | 46(20.2) | 0.271 | 27(17.1) | 32(20.3) | 0.564 |
| No | 197(84.2) | 182(79.8) | 131(82.9) | 126(79.7) | |||
| MRS | 2 | 8(3.4) | 23(10.1) | 0.005 | 8(5.1) | 18(11.4) | 0.123 |
| 3 | 86(36.8) | 63(27.6) | 55(34.8) | 52(32.9) | |||
| 4 | 140(59.8) | 142(62.3) | 95(60.1) | 88(55.7) | |||
Abbreviations: SD, standard deviation; DM, diabetes mellitus; CAD, coronary artery disease; Af, atrial fibrillation; CVA, cerebrovascular accident; MRS, modified Rankin Scale.
*Non-aged group is age younger than 65 years; aged group is age at least 65 years.