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A A：Kaplan⁃Meier Curve before PSM B B：Kaplan⁃Meier Curve before PSM
1.0 1.0
Survival probability 0.9 Psychological resilience Survival probability 0.9 Psychological resilience
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0.1 Low 0.3 Low
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0.0 log⁃rank P < 0.000 1 0.0 log⁃rank P=0.003 5
0 250 500 750 1 000 1 250 1 500 1 750 2 000 2 250 2 500 2 750 3 000 0 250 500 750 1 000 1 250 1 500 1 750 2 000 2 250 2 500 2 750 3 000
Time（day） Time（day）
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C：Kaplan⁃Meier Curve before PSM
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Survival probability 0.9 Psychological resilience
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log⁃rank P < 0.000 1
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A：Crude sample. B：PSM⁃adjusted sample. C：IPW⁃adjusted sample.
图4 暴露组与对照组生存概率的Kaplan⁃Meier曲线与log⁃rank检验
Figure 4 Kaplan⁃Meier curves and log⁃rank tests for survival probability of exposure and control groups
ed most（HR=0.87，95% CI：0.78- 0.97，Figure 5C）. Sensitivity analyses demonstrated that in the data⁃
For BMI，the HR showed a decreasing⁃rising⁃decreas⁃ set imputed using random forest，the association be⁃
ing⁃rising trend with slightly more complex changes， tween psychological resilience and all⁃cause mortality
but the overall trend was decreasing，with statistically among older adults remained consistent with the prima⁃
significant heterogeneity between subpopulations（P < ry analysis（HR：0.914，95% CI：0.849- 0.984，P <
0.001，Figure 5D）. Additionally，the HR was lowest in 0.001，Figure 6）. In the STEPP analysis，subsequent
2
subpopulation 6 at a median BMI of 21.64 kg/m and stratification into subpopulations based on the four obe⁃
2
subpopulation 7 at a median BMI of 22.23 kg/m（both sity indices demonstrated that the heterogeneity in the
HR=0.85，95% CI：0.76- 0.96）. Overall，the associa⁃ effect of psychological resilience remained statistically
tion strength between psychological resilience and all⁃ significant（P < 0.001，Figure 7）across subpopulations.
cause mortality risk was heterogeneous across study
3 Discussion
participants with different obesity levels，and the opti⁃
mal population with high psychological resilience var⁃ In this study，we examined the association be⁃
ied slightly across different obesity indices. tween psychological resilience and all⁃cause mortality
表2 倾向得分匹配后两组参与者肥胖指标比较
Table 2 Comparison of obesity indicators between the two groups based on participants after PSM
All Psychological resilience Standardized
Indictor P
（n=4 486） Low（n=2 243） High（n=2 243） difference
ABSI 0.87 ± 0.21 0.87 ± 0.22 0.87 ± 0.20 0.280 0.032
BRI 3.68（2.79，4.76） 3.65（2.75，4.68） 3.72（2.82，4.84） 0.021 0.058
WHtR 0.52 ± 0.13 0.52 ± 0.12 0.53 ± 0.14 0.140 0.044
BMI 21.00 ± 4.410 21.02 ± 4.470 20.98 ± 4.350 0.772 0.009
ABSI：a body shape index；BRI：body roundness index；WHtR：waist⁃to⁃height⁃ratio；BMI：body mass index.