Table 4.

Final hierarchical model for BV. Odds ratios are adjusted for variables in the same and preceding levels. Age group was included a priori confounding factor in the models at every level.

Variable	Adjusted OR (95% CI)
Level 1
Age
18–25	1
26–35	0.8 (0.5–1.2)
36–45	0.7 (0.4–1.1)
Occupation
Employed	1
Housewife	1.8 (1.1–2.9)
Unemployed/student	1.4 (0.7–3.0)
Level 2 No variables retained
Level 3
Absorbent changing frequency on heavier days
Once per day	1
Twice per day	0.7 (0.4–1.0)
Three+ times per day	0.5 (0.3–0.8)
Body washing frequency during menstruation
Once per day	1
Twice or more per day	1.5 (1.0–2.2)