Table 2. Likelihood ratios (LR) estimating the value of a specific cervicovaginal infection (CVI) to predict a new incident CVIa at the next visit based on 2-sided z-score test with p<0.05 significance level.
Predicted Incident CVI Outcome | |||||||
---|---|---|---|---|---|---|---|
Incident Vaginal Dysbiosis | Incident Sexually Transmitted Infection | ||||||
Predictive Marker: CVI at the visit preceding the incidence of the CVI listed on the right | Nugent 4–6 (n = 450) | BV (n = 484) | Candida (n = 278) | NG (n = 72) | TV (n = 82) | CT (n = 58) | HSV-2 (n = 37) |
Nugent 4–6 | 5.08** | 1.01 | 0.73 | 1.61 | 0.55 | 0.94 | |
Nugent 7–10 (BV) | 3.70** | 1.23 | 1.14 | 0.97 | 1.67 | 2.54* | |
Candida | 1.07 | 1.70* | 1.85 | 1.13 | 0.91b | 1.75b | |
N. gonorrhoeae (NG) | 0.85 | 0.86 | 1.43 | 0.88b | 2.01b | 2.o8b | |
T. vaginalis (TV) | 1.20 | 1.27 | 1.28 | 0b | 0.97b | 0b | |
C. trachomatis (CT) | 0.90 | 0.80 | 0.71b | 3.34*b | 1.3b | 3.07b | |
HSV-2 | 1.08 | 1.00 | 1.20 | 1.07 | 0.98 | 1.18 |
LR = 1 indicates a random occurrence of a CVI incident e.g. vaginal dysbiosis or sexually transmitted infection. LRs > 1 indicate higher and <1 lower likelihood of incident CVI.
*p<0.05
**p<0.01.
aIncident CVI visit is defined as a CVI-positive visit diagnosed following a non-missing quarterly visit, which was negative for the same CVI.
bThe Fisher exact test was used instead of the z-score test due to the small number of cases (<5) in the category examined.