The influence of seasons on craniocerebral chronic vascular diseases, cervical spondylosis, herpes zoster, knee osteoarthritis, lumbar disc disease: a retrospective analysis

Background The distribution characteristics of gender, age, and season and the influence of season on the length of hospitalization stay (LOS) were analyzed based on the information of inpatients about various diseases. Methods A total of 5575 patients’ basic information (gender, age, hospitalization time, season of onset) of five diseases was classified according to spring, summer, autumn, winter. Their distribution characteristics were analysed using T‐test, one‐way ANOVA, Chi‐square test. Then the data were incorporated into SPSS 21.0 for statistical analysis. Results Most cases of cranial chronic vascular disease (CCVD) were found in summer (53% of cases), less in spring, and no cases in winter. The LOS was longer for middle‐aged men, elderly men, and elderly women in the fall group than in the spring group (p < 0.05). The LOS was longer in the fall group than in the summer group for older men and older women (p < 0.05). Herpes zoster cases were more frequent in summer (43%) and autumn (56.30%), less frequent in spring (1.20%), and no cases in winter. Middle‐aged and elderly men in the summer group had longer LOS than the autumn group (p < 0.05). The most cases of cervical spondylosis were found in the spring (42.00%), the fewest were found in the fall (0.10%). Cases of knee osteoarthritis were the most in winter (53.40%) and fewer in summer (7%) and autumn (9.80%). Conclusion CCVD, herpes zoster, cervical spondylosis, and knee osteoarthritis have an obvious seasonal distribution, and seasons have a certain impact on the hospitalization time of patients with CCVD or herpes zoster, especially in older men.