We are currently updating our website, and will have our new version online soon. Please check back later this fall.

Mailing List

Subscribe to the KT Canada mailing list

Login

Welcome

Signup

Once you have signed up, you will receive a confirmation email with your username and password. To activate your account, follow the instructions in the email.

 

Centre for Evidence-
Based Medicine

Example NNTs - Urology

Condition or Disorder Intervention vs. Control Outcome Follow-up Duration Event Rates % NNT (95% CI)
CER EER
Benign prostatic hyperplasia1 Finasteride vs. placebo Surgery for BPH 4 years 10.1 4.6 18 (13 to 27)
Acute urine retention 6.6 2.8 27 (19 to 43)
Urinary incontinence in women2 Bladder training or pelvic muscle exercises with biofeedback assisted instruction vs. combined bladder training plus pelvic muscle exercises Frequency of self reported incontinence 3 months 13 31 5 (3 to 23)
Perceived symptom improvement 30 52 4 (3 to 20)

References

  1. N Engl J Med. 26 Feb 1998; 338: 557-63
  2. Am J Obstet Gynecol. Oct 1998; 179: 999-1007