This study aimed to establish normative reference ranges for daytime and nighttime urination frequencies in healthy women, using data from the Boston Area Community Health Survey. Researchers analyzed 2,534 female participants, classifying them under two health definitions: “healthy” and “elite healthy.” The reference ranges for urination frequencies were found to be 2 to 10 times per day and 0 to 4 times per night in healthy women, and 2 to 9 times per day and 0 to 2 times per night in elite healthy women. Differences were observed based on age, race/ethnicity, and fluid intake. Women aged 45 to 64 reported more daytime urinations, and women aged 65+ had more nighttime urinations compared to younger age groups. Black women reported fewer daytime and more nighttime urinations than White women, and lower fluid intake was linked to fewer urinations overall.

These findings highlight the broad range of normal urination frequencies, with notable variations by demographic factors such as age, race/ethnicity, and fluid intake levels. This study provides valuable reference points for understanding bladder health in women, suggesting that urination patterns can vary widely even among healthy individuals. The results also underscore the importance of considering these demographic variables in bladder health promotion.

Reference: Wyman JF, Cain CH, Epperson CN, et al. Urination Frequency Ranges in Healthy Women. Nurs Res. 2022;71(5):341-352. doi: 10.1097/NNR.0000000000000595.