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Fig. 1 | BMC Infectious Diseases

Fig. 1

From: Tracking social contact networks with online respondent-driven detection: who recruits whom?

Fig. 1

Reported contact persons and recruitment trees. a The empirical reversed cumulative distribution of degree (number of contact persons per participant) is indicated with black circles. The line is the fitted theoretical Poisson inverse-Gaussian distribution with mean μ: 19.6 (95 % CI 18.3–21.1) and dispersion parameter λ: 2.0 (95 % CI 1.8–2.1). b Number of participants (nodes) per recruitment tree. Most recruitment ‘trees’ only consisted of one participant (the seed), two trees consisted of 11 participants. c Number of waves that recruitment trees reached by peer recruitment, with seeds in wave 0. One recruitment tree reached 6 waves of recruits. d Recruitment generation interval. Red line indicates median generation interval

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