Table 2.
Summary of 40 NHBS samples used to create RDS simulations
| Characteristic | Mean | Std Dev | Median | Minimum | Maximum |
|---|---|---|---|---|---|
| Prevalence | 0.104 | 0.0653 | 0.091 | 0.018 | 0.286 |
| Mean Degree | 10.64 | 5.096 | 9.88 | 4.45 | 35.39 |
| Homophily | 1.226 | 0.2281 | 1.19 | 0.91 | 1.99 |
| Differential Activity | 0.931 | 0.2098 | 0.92 | 0.53 | 1.44 |
| Sample Size | 519.1 | 108.85 | 539.5 | 206 | 700 |
| Number of Seeds | 8 | 3.31 | 8 | 3 | 16 |
| Number of Seeds With Trait | 1.1 | 1.18 | 1 | 0 | 5 |
| Number of Seeds Without Trait | 6.8 | 3.21 | 7 | 1 | 16 |
| Number of Seeds Missing Traitˆ | 0.13 | 0.404 | 0 | 0 | 2 |
| % of Coupons Returned | 30.60% | 6.60% | 33.20% | 20.00% | 49.80% |
| Number Recruits = 0* | 33.90% | 7.01% | 35.50% | 21.40% | 48.00% |
| Number Recruits = 1* | 21.80% | 5.07% | 22.10% | 9.10% | 32.10% |
| Number Recruits = 2* | 17.70% | 3.54% | 18.20% | 10.00% | 25.10% |
| Number Recruits = 3* | 10.50% | 2.69% | 10.00% | 4.60% | 16.00% |
| Number Recruits = 4*† | 1.70% | 2.00% | 0.67% | 0% | 7.70% |
| Number Recruits = 5*† | 0.54% | 0.65% | 0.30% | 0% | 2.40% |
ˆ
Assigned to be without trait for purposes of sampling simulation
*
Among sample members who were given coupons.
†
These numbers include 6 studies where a maximum of 3 coupons were distributed per subject; the counts for those studies are constrained to be 0.