Table 3.

Summary of population size estimates of MSM, FSW and IDU using three methods, Nairobi, November 2010

Population	Method	Estimate
MSM	Service multiplier	10 417
	Service multiplier	3261
	Service multiplier	22 222
	Service multiplier	11 667
	Wisdom of the Crowds	10 000
	Literature based	12 265
	Median	10 208
FSW	Service multiplier	54 467
	Service multiplier	16 550
	Service multiplier	649 000
	Wisdom of the Crowds	10 000
	Literature based	29 494
	Median	29 494
IDU	Service multiplier	22 727
	Service multiplier	13 251
	Service multiplier	5031
	Service multiplier	5652
	Wisdom of the Crowds	3000
	Literature based	6562
	Median	6107

FSW, female sex workers; IDU, intravenous drug users; MSM, men who have sex with men.