RESUMO
Marital satisfaction is important for health and well-being among aged couples. The aim of this study is to explore the relationship between knowledge, sexual attitude, and quality of life with marital satisfaction of aged couples of over 60 years in southern Iran. This APIM analytical study was performed on 510 aged couples in southern Iran in 2020. Proportionate stratified sampling was randomly performed in three stages relative to the aging population in main cities in the south Iran. Data collection tools included demographic information (age, education, occupation, living alone, type of disability, etc.), sexual knowledge and attitude scale (SKAS-10), quality of life scale (SF-12), and marital satisfaction questionnaire. Mean score of marital satisfaction, sexual attitude, sexual knowledge, and QoL (SF-12) was 49.71 (SD = 14.8), 27.5 (SD = 7.3), 24.7 (SD = 8.5), and 31.49 (SD = 3.2), respectively. The present study showed that sexual knowledge and attitude, quality of life, are among the estimators of marital satisfaction in aged couples.