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A 1.15 HR LCI UCI B 1.15 HR LCI UCI
（95%CI） 1.10 1.02 1.05 1.08 1.04 1.02 1.00 1.01 1.00 （95%CI） 1.10 1.05 1.05 1.07 1.05 1.01 1.03 1.05 1.03

1.05
1.05
0.97
1.00
1.00
0.96
0.94 0.95
0.95
0.94
0.94
0.92
0.93
Hazard ratio 0.95 0.92 0.84 0.86 0.83 0.91 0.80 0.82 0.81 Hazard ratio 0.95 0.85 0.87 0.85 0.90 0.83 0.84 0.82
0.92
0.90 0.91
0.90
0.90
0.90 0.85
0.85 0.82
0.81
0.82
0.85
0.80
0.75 0.80
0.75
1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
Subpopulations by median ABSI Subpopulations by median BRI
C 1.15 HR LCI UCI D 1.15 HR LCI UCI
（95%CI） 1.10 1.03 1.04 1.04 1.04 1.01 0.98 0.98 1.00 （95%CI） 1.10 1.05 1.05 1.07 1.05 1.01 1.03 1.05 1.03
1.05
1.05
0.97
1.00
1.00
0.95
0.94 0.95
0.94 0.94 0.94
0.94
0.93
0.92
Hazard ratio 0.95 0.85 0.84 0.84 0.91 0.78 0.78 0.79 Hazard ratio 0.95 0.85 0.87 0.85 0.90 0.92 0.84 0.82
0.89
0.87 0.87
0.90 0.85
0.90 0.85
0.83
0.81
0.81
0.85
0.85
0.80
0.75
0.75 0.80
1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
Subpopulations by median BMI Subpopulations by median WHtR
A：A body shape index（ABSI）. B：Body roundness index（BRI）. C：Body mass index（BMI）. D：Waist⁃to⁃height ratio（WHtR）.
图7 经随机森林法插补后不同亚群间关联强度异质性的STEPP分析
Figure 7 STEPP analysis for heterogeneity in association strength among different subpopulations after being imputed by
random forest method
nificance of the current study lies in its investigation of indexes：ABSI，BRI，WHtR，and BMI. Extant research
how psychological factors influence health outcomes has well⁃documented the associations between each of
among older adults by exploring a robust，modifiable these indicators and all⁃cause mortality risk：ABSI is
protective factor from multiple perspectives. As a positively monotonically and independently associated
［19-20］
health protective factor，psychological resilience is with risk of all⁃cause mortality ；BRI shows a posi⁃
closely related to multiple dimensions，including de⁃ tive U⁃shaped association ［21］ ；WHtR exhibits a positive
［20］
pression，anxiety，psychological stress，loneliness，opti⁃ J ⁃ shaped association ；and BMI has an inverse U ⁃
［22］
mistic attitudes，and self⁃control capacity. Depression shaped association . Additionally，the association
has been identified as a critical determinant of all ⁃ strength between BMI and all⁃cause mortality can be
cause mortality ［13］ and is associated with obesity ［14］ . influenced by age，with evidence indicating that this re⁃
［23］
Long⁃term depression diminishes individuals’motiva⁃ lationship weakens in the elderly . Moreover，sub⁃
tion to actively cope with stress through the mediating group analyses stratified by BMI have found that the as⁃
［15］
effects of helplessness and hopelessness ，thereby re⁃ sociation between ABSI and all⁃cause mortality is more
sulting in reduced psychological resilience. Converse⁃ pronounced at lower BMI levels ［24］ . These findings sug⁃
ly，positive events and emotions have been shown to en⁃ gest that when examining the association between expo⁃
［16-17］
hance psychological resilience by fostering a strong sure factors and health outcomes，analysis should not
sense of meaning in life，optimism，subjective well⁃be⁃ be confined to a single indicator. Instead，a multi⁃facet⁃
ing，life satisfaction，and enjoyment of life. Further⁃ ed approach should be adopted，involving comprehen⁃
more，psychological resilience has been identified as sive comparative assessment across multiple indica⁃
negatively associated with depression symptoms and tors. We systematically compared heterogeneity across
［18］
limitations in activities of daily living（ADL） ，indi⁃ distinct subpopulations using the STEPP method strati⁃
cating its potential to mitigate adverse effects of depres⁃ fied by obesity indexes. For ABSI，the protective asso⁃
sion and ADL limitations on all⁃cause mortality. ciation of psychological resilience against all ⁃ cause
In the present study，obesity was assessed by four mortality was more pronounced at higher ABSI levels.