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To investigate the prevalence, types, and risk factors of functional gastrointestinal diseases (FGIDs) in Hainan Province, China, in order to provide insights for future prevention and treatment strategies. A questionnaire survey was conducted from July 2022 to May 2023, using stratified sampling to sample local residents in five cities (20 townships) in Hainan Province. Out of 2057 local residents surveyed, 659 individuals (32.0%) reported experiencing at least one FGID. The most prevalent FGIDs were functional dyspepsia (FD) (10.7%), functional constipation (FC) (9.3%), irritable bowel syndrome (IBS) (6.8%), functional bloating (2.2%), belching disorder (2.2%), functional diarrhea (FDr) (1.5%), functional heartburn (1.5%), and fecal incontinence (0.98%). The study revealed significant associations between FGIDs and factors such as age, sleep quality, anxiety, smoking, alcohol consumption, and the consumption of pickled food (P < 0.05). Older age, poor sleep quality, anxiety, and the consumption of pickled food were identified as independent risk factors for the prevalence of FGIDs (P < 0.05). In Hainan Province, the overall prevalence of FGIDs was found to be 32.0%, with higher prevalences of FC and FD. Older age, poor sleep quality, anxiety, and the consumption of pickled food were identified as risk factors for FGIDs., (© 2024. The Author(s).)

Background: Acute gastrointestinal infections can lead to post-infectious irritable bowel syndrome (PI-IBS). Moreover, coronavirus disease (COVID-19) is related to long-term gastrointestinal sequelae. In this study, the frequency, disease spectrum, and risk factors for post-infection functional gastrointestinal disease (PI-FGID) in COVID-19 patients and healthy controls were prospectively examined., Methods: Validated Rome III and Rome IV questionnaires and limited objective assessment were used to assess the incidence of PI-FGID in 190 COVID-19 patients, and 160 healthy controls prospectively followed for 1, 3, and 6 months., Results: Six(3.2%), 1(0.5%), 3(1.6%), 5(2.6%), 6(3.2%)COVID-19 patients had diarrhea, abdominal pain, constipation, dyspepsia and their overlap at 1 month, respectively, while 4(2.1%), 1(0.5%), 4(2.1%), 4(2.1%), and 6(3.2%)COVID-19 patients had diarrhea, abdominal pain, constipation, dyspepsia and their overlap at three months, respectively. Furthermore, 2(1.3%), 4(2.5%), and 3(1.9%)healthy controls developed constipation, dyspepsia, and their overlap at one month, respectively (P = 0.193), while 2(1.3%), 4(2.5%), and 2(1.3%)healthy controls developed constipation, dyspepsia and their overlap at three months, respectively (P = 0.286). FGIDs incidence was higher among COVID-19 patients(8.9%) than in healthy controls(3.1%) at 6-month follow-up (P = 0.025). Moreover, 7 (3.7%), 5 (2.6%), 3 (1.6%), and 2 (1.1%) COVID-19 patients developed IBS, functional dyspepsia(FD), functional diarrhea(FDr), functional constipation(FC)at six months, respectively, while only 2 (1.3%) and 3 (1.9%) healthy controls developed IBS and FD at six months, respectively. Notably, gastrointestinal(GI)symptoms at onset were the independent risk factors for post-COVID-19 FGIDs at six months., Conclusions: COVID-19 increases new-onset PI-FGID at six months compared with healthy controls. GI symptom at the onset of COVID-19 is an independent risk factor for post-COVID-19 FGIDs., (© 2023. The Author(s).)