You saw James, an 8-year-old boy, in your clinic who was referred for nocturnal enuresis. He had previously achieved daytime and nighttime continence at 3 years old. However, over the past 2 months, he had five episodes of bedwetting. During this time, he had also been experiencing sudden, strong needs to pass urine, having to rush to the toilet. Besides, he had been voiding more than 12 times per day, sometimes only 30 to 45 minutes after his last urination, with only small amounts each time. There was no associated fever, dysuria or haematuria. How would you evaluate James' urinary symptoms?