Background: The influence of the full moon remains a common explanation for wide range of events from death to violence in psychiatric setting. Research has failed to show an association with psychiatric disorders, suicide and selfpoisoning or accidents. However, an increase in unintentional poisoning, absenteeism and aggression has been reported. Our study assessed whether the gravitational pull of the moon generated a tidal wave of increased emergency urological admissions. Patients and Methods: Data was obtained from the Hospital Centralised Emergency Database for a 2-year period of patients who presented as urological emergencies. We assessed daily patterns in emergency room attendees for age, sex, and disease against the lunar cycle and other weekdays. Results: Thirty-five hundred and fortyseven patients presented as urological emergencies (2,057 men, 1,490 women), overall mean of 4.96 patients per day. There were 68 peak days (>8 admissions/day). Emergency presentations peaked around mid-summer and New Year. Patterns were similar for both female and male attendees. Mean daily attendances peaked on Mondays and troughed on Wednesdays (5.1 ± 2.2 vs. 4.5 ± 2.3). Full moons (5.5 ± 2.3 d, p = 0.75) were associated with a higher urological emergencies compared to other days (4.9 ± 2.4 d) while new moons (5.1 ± 2.4 d, p = 0.89) seemed to calm the urological system. Conclusion: Emergency urological admissions were higher on full moon days. The new moon had a calming effect. These trends though not significant, show a possible influence of the lunar cycle on urological admissions. The debate on the lunar cycle effect on human health and behavior continues.

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