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. 1998 Jan 26;1998(1):CD001044. doi: 10.1002/14651858.CD001044

Chatelain 1999.

Methods Double blinded: 
 yes.
Participants N=209 French men with symptomatic BPH, age > 50, IPSS 10 or >, PUF < 15 ml/s, residual volume < 150 ml. Mean age: 66 years. 
 Lost to follow‐up: 26 (11.1%).
Interventions Treatment 1: P. africanum extract (Tadenan) 50 mg x 2 daily (n=101). 
 Treatment 2: P. africanum extract (Tadenan) 100 mg daily (n=108). 
 Treatment duration: 60 days.
Outcomes Symptom score (IPSS); peak urine flow. Adverse events.
Notes 235 men were randomized, 223 completed the comparative phase, but only 209 men were valid for per‐protocol analysis.
Risk of bias
Bias Authors' judgement Support for judgement
Allocation concealment (selection bias) Unclear risk B ‐ Unclear