Kosilov KV, et al. - Authors ascertained the effectiveness of alarm intervention prolongation after the cure in order to reduce the risk of primary monosymptomatic nocturnal enuresis recurrence. Findings suggested likeliness of the effective duration of alarm intervention to be 16–20 weeks of an uninterrupted course of treatment. The maximum effectiveness of treatment and the stability of long-term results was ensured by this time interval. Compared to group A, the percentage of patients who no longer wet the bed 3 months after the end of treatment was higher in groups B and C if the probability of error was p_B/A < 0.05; p_C/A < 0.05.