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The cancer-specific health-related quality of life (HRQoL) questionnaire of the European Organisation for Research and Treatment of Cancer (EORTC), the EORTC QLQ-C30, is a frequently applied questionnaire to assess cancer patients' self-reported health used as part of research and clinical practice. Normative data obtained from the general population can facilitate the interpretation of these data. Despite its frequent application, no detailed EORTC QLQ-C30 normative data have yet been published for the United Kingdom (UK). This study presents detailed EORTC QLQ-C30 normative data for the United Kingdom overall and by sex and age. The data are drawn from a larger published, international, cross-sectional online survey. For the recruitment, the sample was stratified by sex (males, females) and age in five age groups with a sample size of n = 100 per subgroup. A total of N = 1026 UK respondents completed the survey (n = 517 females, n = 509 males). There were no clear subgroup patterns by sex or age; however, older patients tended to show higher (i.e., better) scores in emotional and social functioning; they also reported some of the lowest (i.e., best) scores for symptoms, such as insomnia, appetite loss, diarrhoea, nausea/vomiting or financial difficulties. This paper provides EORTC QLQ-C30 general population normative data for the UK, further stratified by sex and age. These data will greatly support the interpretation of EORTC QLQ-C30 scale scores obtained from UK cancer patients, and also enable comparison with other detailed national normative datasets collected in the same project, across several other European countries and the US. • EORTC QLQ-C30 is a cancer quality of life (QoL) tool for functioning and symptoms. • Normative QoL data collected from 1026 respondents in UK general population. • No clear patterns, generally oldest had better functioning and fewer symptoms. • Look-up tables for EORTC QLQ-C30 scales for the UK general population. • Interpretation aid for data from individual and groups of UK cancer patients. [ABSTRACT FROM AUTHOR]

The European Organisation for Research and Treatment of Cancer (EORTC) QLQ-C30 is a frequently used cancer-specific health-related quality of life (HRQoL) questionnaire. To aid interpretation of data obtained via EORTC QLQ-C30, general population norm data have been published for many countries. However, despite its frequent use in the United States, no normative data by sex and age exist to date. Therefore, this study aimed to generate sex- and age-specific EORTC QLQ-C30 normative data for the United States. Recruitment and data collection were carried out via online panels as part of a larger cross-sectional study. For the recruitment, the sample was stratified by sex and age (18–39, 40–49, 50–59, 60–69, ≥ 70 years) to achieve a balanced distribution, with n = 100 per subgroup. Descriptive statistics are presented by age and age/sex. A total of N = 1009 respondents completed the survey (n = 508 females, n = 501 males). More than two thirds of participants (72.5%) reported at least one health condition, e.g., arthritis (26%). Across EORTC QLQ-C30 scales, women and men 60 years and older reported generally better/higher functioning and better/lower symptom scores compared to the younger age groups. To date, no specific EORTC QLQ-C30 general population normative data have been published for the United States. This paper provides these important normative data, which will greatly support the interpretation of EORTC QLQ-C30 scale scores obtained from US cancer patients, and also enable comparison with European norms. • EORTC QLQ-C30 is a cancer-specific health related quality of life (HRQoL) measure. • HRQoL normative data from US general population was collected (1009 respondents). • EORTC QLQ-C30 look-up tables for the US general population by sex/age are presented. • Participants ≥ 60 years reported overall better functioning than younger age groups. • Results will enhance interpretation and validity from EORTC QLQ-C30 data in the US. [ABSTRACT FROM AUTHOR]