Table 1 Demographic and behavioral characteristics
|  | Overall N = 44 | Controls n = 22 | Lubricant users n = 22 |
|---|---|---|---|
Age, Mean (SD) | 29.8 (6.8) | 30.5 (7.0) | 29.1 (6.8) |
Race | Â | Â | Â |
 African American | 28 (63.6) | 14 (63.6) | 14 (63.6) |
 White | 14 (31.8) | 7 (31.8) | 7 (31.8) |
 Latina | 2 (4.6) | 1 (4.6) | 1 (4.6) |
Douching frequency last 60Â days | Â | Â | Â |
 None | 32 (72.7) | 15 (68.2) | 17 (77.3) |
 Monthly | 3 (6.8) | 3 (13.6) | 0 (0.0) |
 Every now and then | 3 (6.8) | 1 (4.6) | 2 (9.1) |
 No answer | 6 (13.6) | 3 (13.6) | 3 (13.6) |
Vaginal Lubricant use last 60Â days (Y)* | 11 (25.6) | 2 (9.1) | 9 (42.9) |
Current HC use (Y) | 11 (25.0) | 5 (22.7) | 6 (27.3) |
Number sex partners last 60Â days | Â | Â | Â |
 0 | 3 (6.8) | 2 (9.1) | 1 (4.6) |
 1 | 37 (84.1) | 19 (86.4) | 18 (81.8) |
 2 | 4 (9.1) | 1 (4.6) | 3 (13.6) |
Pre-exposure sample pH* | Â | Â | Â |
 4.0–4.5 | 25 (58.1) | 12 (54.6) | 13 (61.9) |
 4.6–5.0 | 10 (23.3) | 6 (27.3) | 4 (19.1) |
 > 5.0 | 8 (18.6) | 4 (18.2) | 4 (19.1) |
Pre-exposure sample Nugent category | Â | Â | Â |
 No BV | 23 (52.3) | 13 (59.1) | 10 (45.5) |
 Intermediate | 8 (18.2) | 2 (9.1) | 6 (27.7) |
 BV | 13 (29.6) | 7 (31.8) | 6 (27.7) |
Pre-exposure sample CST** | Â | Â | Â |
 CST-I, L. crispatus-dominated | 8 (18.2) | 6 (28.6) | 2 (9.1) |
 CST-II, L. gasseri-dominated | 5 (11.4) | 2 (9.5) | 3 (13.6) |
 CST-III, L. iners-dominated | 14 (31.8) | 5 (23.8) | 9 (40.9) |
 CST-IVA, Low Lactobacillus | 7 (15.9) | 3 (14.3) | 4 (18.2) |
 CST-IVB, Low Lactobacillus | 6 (13.6) | 3 (14.3) | 3 (13.6) |
 CST-IVC, Low Lactobacillus | 2 (4.5) | 1 (4.8) | 1 (4.5) |
 CST-V, L. jensenii-dominated | 1 (2.3) | 1 (4.8) | 0 (0.0) |
Pre-exposure sample CST** | Â | Â | Â |
 CST-I/II/V, L. crispatus/gasseri/jensenii-dominated | 14 (32.6) | 9 (42.9) | 5 (22.7) |
 CST-III, L. iners-dominated | 14 (32.6) | 5 (23.8) | 9 (40.9) |
 CST-IVA/B/C, Low Lactobacillus | 15 (34.9) | 7 (33.3) | 8 (36.4) |