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. Author manuscript; available in PMC: 2010 Aug 1.
Published in final edited form as: Soc Sci Med. 2009 Jun 18;69(3):469–474. doi: 10.1016/j.socscimed.2009.05.029

Table 3. Average number of nodes reached with 100 times MC simulation (95% Confidence Interval).

Recruitment Limit Probability of Recruitment (p) Starting with 5 people [i=5] (95% CI) Starting with 10 people [i=10] (95% CI) Starting with 15 people [i=15] (95% CI)
Recruitment limit of 5 people (c=5) p=0.33 91 (76, 106) 185 (161, 209) 258 (231, 285)
p=0.5 1275 (1155, 1395) 2089 (1979, 2199) 2504 (2405,2603)
p=0.75 6087 (5981, 6193) 6753 (6703, 6803) 6948 (6918, 6978)
p=1.0 9596 (9561, 9631) 9839 (9816, 9682) 9910 (9892,9928)
Recruitment limit of 10 people (c=10) p=0.33 2141 (1920, 2362) 3226 (3074,3378) 3707 (3568, 3846)
p=0.5 7633 (7402, 7864) 8332 (8277, 8387) 8701 (8656, 8746)
p=0.75 13390 (13359, 13421) 13504 (13482,13526) 13662 (13641, 13683)
p=1.0 18202 (18172, 18232) 18347 (18318, 18376) 18409 (18382, 18436)

Key:

i = initial number of randomly-selected starting individuals from within the observed network

c = Number of recruitment coupons given (i.e. the maximum number of peers that a participant can subsequently recruit for the simulation)

p = Probability that a peer will participate when asked (i.e. the recruitment incentive’s effectiveness)