Table 4.
Evaluating Sampling Biases and the Independence of Seeds and Peer Recruits in an RDS Sample of Illicit Drug Users in New York City, 2006-2009
| Seeds (n=46) |
Recruits (n=357) |
Networks (mean number of drug-using network members=1.52) N=534 |
P-value for difference between networks and recruits (2-sided) |
P-value for independence of seeds and recruits (2-sided) |
|
|---|---|---|---|---|---|
| Gender | <0.01 | 0.11 | |||
| Female (%) | 34.8 | 23.9 | 36.9 | ||
| Male (%) | 65.2 | 76.1 | 63.1 | ||
| Race/Ethnicity | 0.2214 | 0.01 | |||
| Hispanic (%) | 54.4 | 34.2 | 29.4 | ||
| Black (%) | 43.5 | 55.7 | 61.6 | ||
| White/Other (%) | 2.2 | 10.1 | 9.1 | ||
| Median age | 33.5 | 34 | 35 | <0.01 | 0.62 |
| ≥ High School (%) | 37.0 | 35.3 | 62.6 | <0.01 | 0.82 |
| Inject (%) | 23.9 | 7.3 | 7.7 | 0.81 | <0.01 |
| Smoke crack (%) | 76.1 | 85.4 | 77.1 | <0.01 | 0.10 |
| Snort heroin (%) | 50.0 | 43.8 | 21.8 | <0.01 | 0.43 |
Abbreviations: Respondent Driven Sampling (RDS)