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stata中介效应sobel检验结果怎么看是否存在中介效应啊，是看Z值吗？Z值多大就证明有中介效应，这么多Z值该看哪个呀？
我执行完命令出来了一长串结果，前面哪些都是没用的吗？求大神教教我！
sgmediation 定居意愿, mv(身份) iv(歧视) cv(age 配偶 教育 子女 同住 收入 住房支出 就业 单位 住房 社会保障 范围 流入时间)
Model with dv regressed on iv (path c)
Source | SS df MS Number of obs = 112,452
-------------+---------------------------------- F(14, 112437) = 1541.08
Model | 4215.22799 14 301.087714 Prob > F = 0.0000
Residual | 21967.2527 112,437 .195373878 R-squared = 0.1610
-------------+---------------------------------- Adj R-squared = 0.1609
Total | 26182.4807 112,451 .232834574 Root MSE = .44201
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定居意愿 | Coef. Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
歧视 | -.0551739 .0018991 -29.05 0.000 -.0588962 -.0514516
age | .0034312 .0088781 0.39 0.699 -.0139698 .0208322
配偶 | .0546687 .0047954 11.40 0.000 .0452699 .0640676
教育 | .0564163 .0017546 32.15 0.000 .0529772 .0598553
子女 | .0031487 .0023497 1.34 0.180 -.0014566 .0077541
同住 | .0045143 .0016246 2.78 0.005 .00133 .0076985
收入 | .0727704 .002601 27.98 0.000 .0676725 .0778684
住房支出 | -.0063066 .0004731 -13.33 0.000 -.0072339 -.0053792
就业 | -.0031601 .0013831 -2.28 0.022 -.005871 -.0004491
单位 | .0026253 .0017911 1.47 0.143 -.0008852 .0061358
住房 | -.1847171 .0023781 -77.67 0.000 -.1893782 -.180056
社会保障 | .027724 .0027352 10.14 0.000 .0223631 .0330849
范围 | .0525199 .0018397 28.55 0.000 .0489141 .0561257
流入时间 | .012308 .0002467 49.89 0.000 .0118245 .0127915
_cons | -.1545837 .025111 -6.16 0.000 -.2038009 -.1053665
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Model with mediator regressed on iv (path a)
Source | SS df MS Number of obs = 112,452
-------------+---------------------------------- F(14, 112437) = 1082.08
Model | 4676.62771 14 334.044837 Prob > F = 0.0000
Residual | 34709.9993 112,437 .308706202 R-squared = 0.1187
-------------+---------------------------------- Adj R-squared = 0.1186
Total | 39386.627 112,451 .350255907 Root MSE = .55561
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身份 | Coef. Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
歧视 | -.1581203 .0023873 -66.24 0.000 -.1627993 -.1534413
age | .2495889 .0111599 22.36 0.000 .2277157 .2714622
配偶 | .0003216 .0060278 0.05 0.957 -.0114928 .0121361
教育 | .027253 .0022056 12.36 0.000 .0229302 .0315759
子女 | -.0121196 .0029536 -4.10 0.000 -.0179086 -.0063306
同住 | -.0017565 .0020422 -0.86 0.390 -.0057591 .0022461
收入 | -.0111089 .0032695 -3.40 0.001 -.017517 -.0047008
住房支出 | -.0058828 .0005948 -9.89 0.000 -.0070486 -.0047171
就业 | .022993 .0017386 13.22 0.000 .0195853 .0264007
单位 | -.0052076 .0022514 -2.31 0.021 -.0096204 -.0007948
住房 | -.1293779 .0029893 -43.28 0.000 -.1352369 -.1235188
社会保障 | .0185666 .0034381 5.40 0.000 .0118279 .0253053
范围 | .085826 .0023125 37.11 0.000 .0812935 .0903585
流入时间 | .0070102 .0003101 22.61 0.000 .0064024 .0076179
_cons | 3.233254 .0315648 102.43 0.000 3.171387 3.295121
------------------------------------------------------------------------------
Model with dv regressed on mediator and iv (paths b and c')
Source | SS df MS Number of obs = 112,452
-------------+---------------------------------- F(15, 112436) = 1799.84
Model | 5069.54308 15 337.969538 Prob > F = 0.0000
Residual | 21112.9376 112,436 .187777381 R-squared = 0.1936
-------------+---------------------------------- Adj R-squared = 0.1935
Total | 26182.4807 112,451 .232834574 Root MSE = .43333
------------------------------------------------------------------------------
定居意愿 | Coef. Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
身份 | .1568851 .0023259 67.45 0.000 .1523263 .1614439
歧视 | -.0303672 .0018978 -16.00 0.000 -.0340869 -.0266475
age | -.0357256 .0087232 -4.10 0.000 -.0528229 -.0186283
配偶 | .0546183 .0047012 11.62 0.000 .045404 .0638326
教育 | .0521407 .0017213 30.29 0.000 .0487669 .0555145
子女 | .0050501 .0023037 2.19 0.028 .0005348 .0095654
同住 | .0047898 .0015927 3.01 0.003 .0016681 .0079116
收入 | .0745133 .0025501 29.22 0.000 .0695152 .0795113
住房支出 | -.0053836 .0004641 -11.60 0.000 -.0062932 -.0044741
就业 | -.0067673 .001357 -4.99 0.000 -.0094271 -.0041076
单位 | .0034423 .001756 1.96 0.050 6.25e-07 .006884
住房 | -.1644196 .0023508 -69.94 0.000 -.1690271 -.1598121
社会保障 | .0248112 .0026818 9.25 0.000 .0195548 .0300675
范围 | .0390551 .0018146 21.52 0.000 .0354985 .0426117
流入时间 | .0112082 .0002424 46.24 0.000 .0107331 .0116833
_cons | -.6618331 .025741 -25.71 0.000 -.7122852 -.6113811
------------------------------------------------------------------------------
Sobel-Goodman Mediation Tests
Coef Std Err Z P>|Z|
Sobel -.02480672 .00052491 -47.26 0
Goodman-1 (Aroian) -.02480672 .00052494 -47.26 0
Goodman-2 -.02480672 .00052488 -47.26 0
Coef Std Err Z P>|Z|
a coefficient = -.15812 .002387 -66.2352 0
b coefficient = .156885 .002326 67.4508 0
Indirect effect = -.024807 .000525 -47.2593 0
Direct effect = -.030367 .001898 -16.0009 0
Total effect = -.055174 .001899 -29.0519 0
Proportion of total effect that is mediated: .44960944
Ratio of indirect to direct effect: .81689163
Ratio of total to direct effect: 1.8168916
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