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. 2020 Jan 8;15(1):e0224359. doi: 10.1371/journal.pone.0224359

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.