Factor structure and concurrent validity of the Satisfaction with Life Domains Scale for Cancer (SLDS-C).

The Satisfaction with Life Domains Scale for Cancer (SLDS-C) is a brief self-report measure of quality of life that uses a familiar and easily understood graphic response format of smiling and frowning faces. This article explores the factor structure and further examines the validity of the SLDS-C compared with another cancer specific quality-of-life measure, the Functional Assessment of Cancer Therapy Scale-General (FACT-G), in a sample of patients with a variety of cancer diagnoses. A self-administered questionnaire containing the SLDS-C and the FACT-G was completed by 352 adult cancer survivors who were at various points post diagnosis. Three SLDS-C factor subscales were derived from analyses of these data: "Life as a Whole," "Daily Activities," and "Social Relationships." Evidence for the concurrent validity of the SLDS-C is presented, including its correlation with the total score of the FACT-G (r = .76) and its correlation with subscale scores of this widely used cancer quality-of-life measure. The SLDS-C has a high level of internal consistency (alpha = .94), and differences in SLDS-C total scores were found for time since diagnosis, number of diagnoses, spread of disease, type of cancer, and treatment status.