Age differences in associations of different indicators of socioeconomic status with social isolation: A cross-sectional study

Abstract Background Socioeconomic status is a crucial determinant of social isolation. However, little is known whether the associations between different indicators of socioeconomic status and social isolation vary across age groups. This study examined the association of individual socioeconomic status indicators with social isolation in three age groups: young (21-44 years), middle-aged (45-64 years), and older adults (≥65 years). Methods Cross-sectional data for 1,930 representative community-dwelling adults aged 21 and above in the Central region of Singapore was used. The 6-item Lubben Social Network Scale was used to assess social isolation. Socioeconomic status was measured using education level, employment status, personal income, housing type and self-perceived money sufficiency). Separate logistic regression analyses were conducted to examine the association between each SES indicator and social isolation in each age group. Results Each socioeconomic indicator showed a clear gradient with social isolation and significant age disparities were found in their relationship. Socioeconomic status indicators significantly associated with social isolation were income (R2 change=2.5%) and self-perceived money insufficiency (R2 change=1.5%) in young adults, education (R2 change=0.5%), employment status (R2 change=1.3%), income (R2 change=0.8%), housing type (R2 change=1.9%) and self-perceived money insufficiency (R2 change=2.0%) in middle-aged adults, and housing type (R2 change=1.3%) and self-perceived money insufficiency (R2 change=3.7%) in older adults when adjusting for demographics and other indicators. Conclusions The influence of individual socioeconomic status indicators on social isolation varied across age groups. This study provides a rationale for the choice of socioeconomic status indicator and specific interventions need to target different socioeconomic status groups for different age groups.