# of prescriptions # PTB n(%) Term Total OR [95% CI]
1 3388 (7.3) 42,565 45,953 1.30 [1.26, 1.35]
2 935 (7.6) 11,347 12,282 1.35 [1.26 1.44]
\(\mathbf{\geq 3}\) 464 (8.3) 5118 5582 1.48 [1.35, 1.63]
No BV &
no medication 125,815 (5.7) 2,061,443 2,187,258