Age (years) |
<25 | 31/61 (51) | 1.00 | | 1.00 | 0.506 | |
25–34 | 60/100 (60) | 1.45 | 0.76 to 2.76 | 0.58 | | 0.22 to 1.52 |
⩾35 | 38/54 (70) | 2.30 | 1.06 to 4.96 | 0.76 | | 0.15 to 3.89 |
Ethnicity |
White | 106/184 (58) | 1.00 | | | | |
Black | 11/14 (79) | 2.70 | 0.73 to 10.00 | | | |
Education |
⩾ University level | 32/73 (44) | 1.00 | | 1.00 | 0.022 | |
< University level | 94/139 (68) | 2.68 | 1.49 to 4.79 | 2.58 | | 1.14 to 5.83 |
Age at first sex (years) |
<18 | 92/147 (63) | 1.00 | | | | |
18–19 | 16/36 (44) | 0.48 | 0.23 to 1.00 | | | |
⩾20 | 17/27 (63) | 1.02 | 0.44 to 2.38 | | | |
Years of sexual activity |
<5 | 10/28 (36) | 1.00 | | 1.00 | 0.093 | |
5–14 | 61/105 (58) | 2.50 | 1.05 to 5.93 | 3.18 | | 0.87 to 11.66 |
15–24 | 38/51 (75) | 5.26 | 1.94 to 14.26 | 6.64 | | 1.17 to 37.70 |
⩾25 | 16/26 (62) | 2.88 | 0.95 to 8.70 | 2.55 | | 0.30 to 21.57 |
Lifetime partners |
<5 | 45/83 (54) | 1.00 | | | | |
5–9 | 32/47 (68) | 1.80 | 0.85 to 3.81 | | | |
⩾10 | 50/83 (60) | 1.28 | 0.69 to 2.37 | | | |
Use of condom |
Never | 15/24 (63) | 1.00 | | | | |
Ever | 113/190 (60) | 0.88 | 0.37 to 2.11 | | | |
History of other STIs: |
Yes | 62/93 (67) | 1.00 | | | | |
No | 66/121 (55) | 0.60 | 0.34 to 1.05 | | | |
Patient history of cold sores |
Yes | 56/69 (81) | 1.00 | | 1.00 | <0.001 | |
No/not known | 71/144 (49) | 0.23 | 0.11 to 0.45 | 0.21 | | 0.10 to 0.44 |
Occupation |
Intellectual | 35/65 (54) | 1.00 | | | | |
Manual | 45/70 (64) | 1.54 | 0.77 to 3.08 | | | |
Student | 11/31 (36) | 0.47 | 0.20 to 1.14 | | | |