生存分析及cox比例风险模型

1、一般手术(A组): 3 9 15 20 20 26 30 41 46 64+ 64 135 3 9 15 20 20 26 30 41 46 64+ 64 135 223 365 450 596+ 680+ 900+ 900+ 223 365 450 596+ 680+ 900+ 900+改进手术(B组): 10 70+ 70+ 120 225 366 390+ 475+ 10 70+ 70+ 120 225 366 390+ 475+ 518+ 647+ 801+ 1001+ 1045+ 1045+ 518+ 647+ 801+ 1001+ 1045+ 1045+. stci,by(trea

2、t)stci,by(treat) failure _d: outcome failure _d: outcome analysis time _t: time analysis time _t: time | no. of | no. of treat | subjects 50% Std. Err. 95% Conf. Interval treat | subjects 50% Std. Err. 95% Conf. Interval-+-+- 1 | 19 64 46.8995 20 450 1 | 19 64 46.8995 20 450 2 | 14 . . 225 . 2 | 14

3、. . 225 .-+-+- total | 33 365 143.4001 64 . total | 33 365 143.4001 64 . . stci,rmean by(treat)stci,rmean by(treat) failure _d: outcome failure _d: outcome analysis time _t: time analysis time _t: time | no. of restricted | no. of restrictedtreat | subjects mean Std. Err. 95% Conf. Intervaltreat | s

4、ubjects mean Std. Err. 95% Conf. Interval-+-+- 1 | 19 297.0329( 1 | 19 297.0329(* *) 83.96867 132.457 461.60) 83.96867 132.457 461.60 2 | 14 766.4481( 2 | 14 766.4481(* *) 116.2397 538.622 994.274) 116.2397 538.622 994.274-+-+- total | 33 512.9716( total | 33 512.9716(* *) 83.84662 348.635 677.308)

5、83.84662 348.635 677.308( (* *)largest observed analysis time is censored, mean is underestimated)largest observed analysis time is censored, mean is underestimated. . sts list,by(treat)sts list,by(treat) failure _d: outcome failure _d: outcome analysis time _t: time analysis time _t: time Beg. Net

6、Survivor Std. Beg. Net Survivor Std. Time Total Fail Lost Function Error 95% Conf. Int. Time Total Fail Lost Function Error 95% Conf. Int.-treat=1 treat=1 3 19 1 0 0.9474 0.0512 0.6812 0.9924 3 19 1 0 0.9474 0.0512 0.6812 0.9924 . . 680 3 0 1 0.2368 0.1015 0.0758 0.4475 680 3 0 1 0.2368 0.1015 0.075

7、8 0.4475 900 2 0 2 0.2368 0.1015 0.0758 0.4475 900 2 0 2 0.2368 0.1015 0.0758 0.4475treat=2 treat=2 10 14 1 0 0.9286 0.0688 0.5908 0.9896 10 14 1 0 0.9286 0.0688 0.5908 0.9896 70 13 0 2 0.9286 0.0688 0.5908 0.9896 70 13 0 2 0.9286 0.0688 0.5908 0.9896 . . 1001 3 0 1 0.6753 0.1344 0.3464 0.8647 1001

8、3 0 1 0.6753 0.1344 0.3464 0.8647 1045 2 0 2 0.6753 0.1344 0.3464 0.8647 1045 2 0 2 0.6753 0.1344 0.3464 0.8647-Kaplan-Meier survival estimates, by treat analysis time050010000.000.250.500.751.00treat 1treat 2212622Observed vs. Predicted Survival ProbabilitiesBy Categories of treatanalysis time Obse

9、rved: treat = 1 Observed: treat = 2 Predicted: treat = 1 Predicted: treat = 2310450.000.250.500.751.00. sts test treat. sts test treat failure _d: outcome failure _d: outcome analysis time _t: time analysis time _t: timeLog-rank test for equality of survivor functionsLog-rank test for equality of survivor functions | Events Events | Events Eventstreat | observed expectedtreat | observed expected-+-