Chinese version of a Social Frailty Scale

Authors

Purpose

The primary purpose of the CVSFS is to address a significant gap in the assessment of social vulnerability among Chinese Older adults. Historically, tools designed to measure social frailty have either been imported and loosely translated without adequate cultural adaptation, or they have lacked the psychometric rigor required to establish severity thresholds. Instruments like the HALFT scale or the social frailty Comprehensive Questionnaire (SFCQ) often miss the nuanced socio-cultural dynamics specific to mainland China, such as local community structures and traditional family expectations.

By providing a localized, methodologically sound instrument, the CVSFS empowers healthcare professionals to accurately diagnose social frailty and stratify patients by risk level. This stratification is crucial for clinical practice, as it dictates the intensity and type of intervention required. Mild cases might benefit from simple community integration strategies, whereas severe cases may necessitate comprehensive, multi-disciplinary care plans involving family therapy and social services.

Construct

The CVSFS is deeply rooted in the Social-Ecological Model (SEM), a theoretical framework that conceptualizes human experience as being shaped by a series of nested, interacting environmental systems. Rather than viewing social frailty as an isolated individual deficit, this model posits that vulnerability emerges from a breakdown in the dynamic interplay between the older adult and their surroundings.

To capture this complexity, the construct is operationalized across four distinct dimensions. The individual level (micro-system) assesses personal emotional states and daily living patterns. The family level (meso-system) evaluates the strength and quality of immediate familial support. The interpersonal level (exo-system) looks outward to neighborhood ties and broader social interactions. Finally, the community and social level (macro-system) examines the impact of the larger societal environment, including cultural inclusivity and the individual's overarching sense of belonging. This multi-layered approach ensures a holistic measurement of social frailty.

Validity

The development of the CVSFS involved rigorous validation procedures to ensure the instrument accurately measures what it intends to measure. Content validity was established early in the process through expert consensus, yielding excellent Item-Level Content Validity Indices (I-CVI) ranging from 0.889 to 1.000, and a Scale-Level Content Validity Index (S-CVI/Ave) of 0.930. These figures indicate strong agreement among experts that the items are highly relevant to the construct of social frailty in the target population.

Construct validity was subsequently confirmed using Confirmatory Factor Analysis (CFA). The theoretical four-factor structure derived from the Social-Ecological Model demonstrated a satisfactory fit to the data. Key fit indices supported the model's robustness, with a Comparative Fit Index (CFI) of 0.937 and a Tucker-Lewis Index (TLI) of 0.932, both exceeding the standard threshold for acceptable fit. Additionally, the Root Mean Square Error of Approximation (RMSEA) was 0.064, and the chi-square to degrees of freedom ratio was 2.17, further confirming that the 36-item structure accurately reflects the underlying multidimensional nature of social frailty.

Reliability

Psychometric evaluation of the CVSFS revealed exceptional reliability, indicating that the scale produces consistent and stable results. Internal consistency was remarkably high, evidenced by a Cronbach's alpha of 0.926 and a McDonald's omega of 0.931. These values are well above the conventional 0.80 threshold, suggesting that the items within the scale are highly correlated and reliably measure the unified construct of social frailty without excessive redundancy.

Furthermore, the instrument demonstrated outstanding temporal stability. A test-retest reliability coefficient of 0.978 indicates that Older adults' scores remain highly consistent over time when their underlying social circumstances have not changed. The split-half reliability was also strong at 0.928. Together, these metrics confirm that the CVSFS is a highly dependable tool suitable for both longitudinal research and routine clinical monitoring.

Factor Analysis

The structural integrity of the CVSFS was established through a sequential approach utilizing both Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA). During the initial optimization phase, an EFA was conducted on the original 42-item pool using data from 265 community-dwelling Older adults. This process identified poorly performing items, leading to the removal of six items and the crystallization of a 36-item scale organized into four distinct factors corresponding to the Social-Ecological Model.

In the subsequent validation phase, a CFA was performed on a new sample of 287 participants to verify this four-factor structure. The analysis confirmed that the items mapped cleanly onto their respective dimensions: individual, family, interpersonal, and community/social levels. The resulting fit indices (such as the CFI of 0.937 and RMSEA of 0.064) provided strong empirical evidence that the theoretical framework successfully translates into a measurable, multidimensional statistical model.

Subscales

Subscale	Items	Description
Individual level		Assesses the micro-system, including the individual's subjective emotions, self-care abilities, and daily living patterns.
Family level		Assesses the meso-system, focusing on family support and the quality of relationships between family members.
Interpersonal level		Assesses the external system, capturing neighborhood relationships, social interactions, and participation in social activities.
Community and social level		Assesses the macro-system, evaluating the influence of the broader social environment, cultural inclusiveness, and the individual's sense of societal belonging.

Instrument

Test Type	Self-report questionnaire
Format	36 items
Language	Chinese
Population	Older adults
Age Group	60-89 years

Figures

Chinese version of a Social Frailty Scale Items

Sample

The scale was validated across two distinct cross-sectional survey phases. Phase II (item optimization) included 265 community-dwelling Older adults (115 males, 150 females) with a mean age of 71.89 ± 7.04 years. Phase III (validation testing) utilized an independent sample of 287 Older adults (138 males, 149 females) with a mean age of 72.67 ± 8.12 years, ranging from 60 to 89 years old.