Characteristics | Before PSM (n = 398) | After PSM (n = 218) | ||||
---|---|---|---|---|---|---|
Conventional group (n = 202) | Novel technique group (n = 196) | P | Conventional group (n = 109) | Novel technique group (n = 109) | P | |
Gender (male to female) | 31:171 | 52:144 | 0.006b | 20:89 | 25:84 | 0.403b |
Side (left to right) | 101:101 | 95:101 | 0.760b | 53:56 | 52:57 | 0.892b |
Ethnicity (Han to other) | 198:4 | 188:8 | 0.351b | 106:3 | 105:4 | 1.000b |
Etiology (OA to RA to others) | 165:31:6 | 182:11:3 | 0.003b | 104:4:1 | 97:10:2 | 0.180b |
Age (1:2:3:4:5) | 16:68:101:14:3 | 5:11:78:86:16 | < 0.001b | 1:14:77:14:3 | 5:11:75:15:3 | 0.573b |
BMI (kg/m2) | 25.43 ± 3.31 | 25.60 ± 3.23 | 0.604a | 25.56 ± 3.34 | 25.60 ± 3.42 | 0.937a |
Hb preoperative (g/L) | 127.25 ± 14.53 | 130.90 ± 14.46 | 0.013a | 130.68 ± 12.36 | 130.28 ± 14.61 | 0.830a |
HKA preoperative (degree) | − 6.86 ± 10.60 | − 9.39 ± 8.79 | 0.010a | − 9.17 ± 10.05 | − 9.30 ± 8.60 | 0.916a |