Table 3.
Pilot study participant characteristics
| Characteristics, n=42 | Clinical site | ||
| Clinic 1 | Clinic 2 | Both sites | |
| Number of participants | 21 | 21 | 42 |
| Participant age in years, mean (SD) | 27.10 (5.09) | 33.05 (4.54) | 30.07 (5.64) |
| Ethnicity, n (%) | |||
| African-American/black | 18 (85.7) | 7 (33.3) | 25 (59.5) |
| Asian | 0 (0.0) | 4 (19.0) | 4 (9.5) |
| Caucasian/white | 2 (9.5) | 9 (42.9) | 11 (26.2) |
| Hispanic, Latino or Chicano | 0 (0.0) | 1 (4.8) | 1 (2.4) |
| Some other group | 1 (4.8) | 0 (0.0) | 1 (2.4) |
| Trimester, n (%) | |||
| First | 2 (9.5) | 2 (9.5) | 4 (9.5) |
| Second | 6 (28.6) | 6 (28.6) | 12 (28.6) |
| Third | 13 (61.9) | 13 (61.9) | 26 (61.9) |
| Urine results, n (%) | |||
| Negative for all substances | 15 (71.4) | 16 (80.0) | 31 (75.6) |
| Positive for at least one substance | 6 (28.6) | 4 (20.0) | 10 (24.4) |
| Hair results, n (%) | |||
| Negative for all substances | 12 (60.0) | 18 (85.7) | 30 (73.2) |
| Positive for at least one substance | 7 (35.0) | 2 (9.5) | 9 (22.0) |
| Invalid | 1 (5.0) | 1 (4.8) | 2 (4.9) |
| Study disposition, n (%) | |||
| Study completes | 19 (90.48) | 16 (76.2) | 35 (83.3) |
| Lost to follow-up | 2 (9.52) | 5 (23.8) | 7 (16.7) |