Colorectal cancer (CRC) is a major clinical and public health burden. Screening has been shown to be effective in preventing CRC. In 2021, less than 72% of adult Americans had received CRC screening based on the most recent guidelines. This study examined the relationship between social support and screening colonoscopy or sigmoidoscopy uptake among U.S. adults and the socioeconomic factors that impact the relationship. We conducted a cross-sectional study using the 2021 National Health Interview Survey (NHIS) data for 20,008 U.S. adults to assess the weighted rates of screening colonoscopy or sigmoidoscopy among individuals with strong, some, and weak social support. Adjusted binary logistic regression models were utilized to obtain the weighted odds of receiving a screening colonoscopy or sigmoidoscopy among adults with different levels of social support and socioeconomic status. About 58.0% of adults who reported having colonoscopy or sigmoidoscopy had strong social support, compared to 52.0% who had some or weak social support. In addition, compared to adults with weak social support, the weighted adjusted odds of having colonoscopy or sigmoidoscopy were 1.0 (95% C.I. = 0.994, 0.997; p < 0.001) and 1.3 (95% C.I. = 1.260, 1.263; p < 0.001) for adults with some and strong social support, respectively. Socioeconomic differences were observed in the odds of colonoscopy or sigmoidoscopy uptake based on having strong social support. Having strong social support is an important factor in increasing colonoscopy or sigmoidoscopy screening uptake. Policies and interventions that enhance social support among adults for screening colonoscopy or sigmoidoscopy are warranted.
Keywords: colonoscopy; colorectal cancer; screening; sigmoidoscopy; social support.