Table 2

Sexual risk factors of women with BV compared with controls (univariate analysis)

CharacteristicWomen with BV n = 890 (%)Controls n = 890 (%)Odds ratios (95% CI)p Value (overall)
*Odds ratios and 95% confidence intervals (CI) not calculated on individual number of lifetime partners because the variable was not significant at p<0.05. NS, not significant.
Concurrent STIs
    Gonorrhoea5 (<1)7 (<1)0.70 (0.23 to 2.25)NS
    Chlamydia91 (5)28 (2)1.70 (0.91 to 3.07)NS
    Genital HPV105 (6)115 (7)0.90 (0.68 to 1.20)NS
    Genital HSV45 (3)86 (5) 0.50 (0.34 to 0.72) <0.001
    PID37 (2)15 (1) 2.50 (1.38 to 4.64) <0.005
    Candidiasis65 (4)91 (5) 0.70 (0.50 to 0.97) <0.05
Male sex partners 3 months(<0.01)
    0134 (15)128 (14)1.20 (0.90 to 1.54)NS
    1519 (58)581 (65)1
    ⩾2237 (27)180 (20) 1.50 (1.18 to 1.85) <0.001
Male sex partners 12 months(<0.0001)
    084 (10)71 (8)1.40 (0.99 to 2.00)NS
    1305 (34)363 (41)1
    2198 (22)230 (26)1.00 (0.80 to 1.31)NS
    ⩾3303 (34)225 (25) 1.60 (1.27 to 2.02) <0.0001
Male sex partners lifetime*(NS)
    071 (8)72 (8)
    145 (5)59 (7)
    2–5238 (27)267 (30)
    ⩾6536 (60)491 (55)1
⩾1 Female sex partner 12 months68 (8)31 (3) 2.30 (1.48 to 3.54) <0.0001
Female sex partners (lifetime)(<0.01)
    0777 (87)819 (92)1
    140 (5)31 (4)1.40 (0.84 to 2.10)NS
    ⩾273 (8)39 (4) 2.00 (1.32 to 2.95) <0.001
Condom use 3 months(<0.05)
    None348/831 (42)302/832 (36)1
    Sometimes (<50%)124/831 (15)109/832 (13)1.00 (0.73 to 1.33)NS
    Usually (>50%)120/831 (14)126/832 (15)0.80 (0.62 to 1.11)NS
    Always (100%)160/831 (19)212/832 (26) 0.70 (0.51 to 0.85) 0.001