Table 1. Overactive bladder symptom-related questions and definitions of the study in Finland, 2003–2004.

Symptoms	Defining questions (with answer options)	Normal	Abnormal
Urgency and overactive bladder*	“Do you experience an imperative (strong) urge to urinate?” with answer options: never-rarely-often-always.	Never or rarely	Often or always
Urgency incontinence	“Is the urge so strong that urine starts to flow before you reach the toilet?” with answer options: never-rarely-often-always.	Never or rarely	Often or always
Frequency	“How many times did you usually urinate per day during the last month?”	≤8 voids per day	>8 voids per day
Nocturia	“How many times do you have to void per night?” and “How many times did you most typically get up to urinate from the time you went to bed at night until you got up in the morning?” were combined.	≤1 void per night	>1 void per night

^*Urgency classification without any exclusions; overactive bladder classification was performed after exclusion of subjects with urinary tract infection or other obvious pathology (Table 2).