Educational differences in healthcare use among survivors after breast, prostate, lung, and colon cancer – a SEQUEL cohort study

Background: Many cancer survivors experience late effects after cancer. Comorbidity, health literacy, late effects, and help-seeking behavior may affect healthcare use and may differ among socioeconomic groups. We examined healthcare use among cancer survivors, compared with cancer-free individuals, and investigated educational differences in healthcare use among cancer survivors. Methods: A Danish cohort of 127,472 breast, prostate, lung, and colon cancer survivors from the national cancer databases, and 637,258 age- and sex-matched cancer-free individuals was established. Date of entry was 12 months after diagnosis/index date (for cancer-free individuals). Follow-up ended at death, emigration, new primary cancer, December 31st, 2018, or up to 10 years. Information about education and healthcare use, defined as the number of consultations with general practitioner (GP), private practicing specialists (PPS), hospital, and acute healthcare contacts 1–9 years after diagnosis/index date, was extracted from national registers. We used Poisson regression models to compare healthcare use between cancer survivors and cancer-free individuals, and to investigate the association between education and healthcare use among cancer survivors. Results: Cancer survivors had more GP, hospital, and acute healthcare contacts than cancer-free individuals, while the use of PPS were alike. One-to-four-year survivors with short compared to long education had more GP consultations (breast, rate ratios (RR) = 1.28, 95% CI = 1.25–1.30; prostate, RR = 1.14, 95% CI = 1.10–1.18; lung, RR = 1.18, 95% CI = 1.13–1.23; and colon cancer, RR = 1.17, 95% CI = 1.13–1.22) and acute contacts (breast, RR = 1.35, 95% CI = 1.26–1.45; prostate, RR = 1.26, 95% CI = 1.15–1.38; lung, RR = 1.24, 95% CI = 1.16–1.33; and colon cancer, RR = 1.35, 95% CI = 1.14–1.60), even after adjusting for comorbidity. One-to-four-year survivors with short compared to long education had less consultations with PPS, while no as