| Before PSM |  |  |  |  | After PSM |  |  |  |
---|---|---|---|---|---|---|---|---|---|
Variables | Control | Â | Exposure | Z/P | Â | Control | Â | Exposure | Z/P |
 | n = 120 |  | n = 431 |  |  | n = 98 |  | n = 98 |  |
Age | 61(53 ~ 70) |  | 63(57 ~ 70) | 0.1/0.18 |  | 63(54 ~ 70) |  | 62(56 ~ 69) | 0.5/0.6 |
BMI | 28.6(26.0 ~ 31.6) |  | 30.3(27.2 ~ 33.9) | 3.3/<0.05 |  | 29.5(26.6 ~ 32.4) |  | 28.9(26.3 ~ 31.6) | 0.7/0.51 |
RWOMAC | 3(0 ~ 13.9) |  | 11.5(2 ~ 25) | 5.1/<0.05 |  | 6.1(0 ~ 17.3) |  | 7(2 ~ 15.3) | 0.5/0.63 |
RJSW | 4(3.0 ~ 4.9) |  | 3.7(2.6 ~ 4.7) | 2.1/<0.05 |  | 3.8(2.7 ~ 4.6) |  | 3.7(2.5 ~ 5.1) | 0.5/0.6 |
SF-12 | 41(39 ~ 42) |  | 41(39 ~ 43) | 0.05/0.09 |  | 41(38 ~ 42.2) |  | 41.5(39 ~ 43) | 1.5/0.14 |
Sex | Â | Â | Â | 0.8/0.42 | Â | Â | Â | Â | 0.4/0.67 |
male | 59(49.2%) | Â | 194(45%) | Â | Â | 50(51%) | Â | 53(54.1%) | Â |
female | 61(50.8%) | Â | 237(55%) | Â | Â | 48(49%) | Â | 45(45.9%) | Â |
Race | Â | Â | Â | 3.4/<0.05 | Â | Â | Â | Â | 0.4/0.69 |
others | 2(1.7%) | Â | 6(1.4%) | Â | Â | 1(1%) | Â | 0 | Â |
white | 105(87.5%) | Â | 314(72.8%) | Â | Â | 84(85.7%) | Â | 84(85.7%) | Â |
black | 13(10.8%) | Â | 109(25.3%) | Â | Â | 13(13.3%) | Â | 13(13.3%) | Â |
yellow | 0 | Â | 2(0.5%) | Â | Â | 0 | Â | 1(1%) | Â |
CCI | Â | Â | Â | 1.1/0.27 | Â | Â | Â | Â | 0.5/0.63 |
0 | 92(76.7%) | Â | 305(70.8%) | Â | Â | 75(76.5%) | Â | 72(73.5%) | Â |
1 | 17(14.1%) | Â | 84(19.5%) | Â | Â | 14(14.3%) | Â | 14(14.3%) | Â |
2 | 5(4.2%) | Â | 34(7.9%) | Â | Â | 4(4.1%) | Â | 10(10.2%) | Â |
3 | 3(2.5%) | Â | 5(1.2%) | Â | Â | 3(3.1%) | Â | 2(2%) | Â |
> 3 | 3(2.5%) |  | 3(0.7%) |  |  | 2(2%) |  | 0 |  |
Income(5Â W) | Â | Â | Â | 1.8/0.07 | Â | Â | Â | Â | 0.8/0.46 |
Y | 78(65%) | Â | 241(55.9%) | Â | Â | 61(62.2%) | Â | 66(67.3%) | Â |
N | 42(35%) | Â | 190(44.1%) | Â | Â | 37(37.8%) | Â | 32(32.7%) | Â |
R-KLG | Â | Â | Â | 1.9/0.06 | Â | Â | Â | Â | 0.5/0.62 |
2 | 75(62.5%) | Â | 218(50.6%) | Â | Â | 55(56.1%) | Â | 50(51%) | Â |
3 | 34(28.3%) | Â | 185(42.9%) | Â | Â | 33(33.7%) | Â | 40(40.8%) | Â |
4 | 11(9.2%) | Â | 28(6.5%) | Â | Â | 10(10.2%) | Â | 8(8.2%) | Â |
Medicine | Â | Â | Â | 0.7/0.48 | Â | Â | Â | Â | 0.4/0.67 |
Y | 67(55.8%) | Â | 225(52.2%) | Â | Â | 51(52%) | Â | 48(49%) | Â |
N | 53(44.2%) | Â | 206(47.8%) | Â | Â | 47(48%) | Â | 50(51%) | Â |