| Characteristic . | Vaccine (n = 450) . | Placebo (n = 226) . | Total (N = 676) . |
|---|---|---|---|
| Age, mean ± SD, y | 16.9 ± 4.36 | 16.8 ± 4.16 | 16.9 ± 4.29 |
| Age group, No. (%) | |||
| 10–14 y | 155 (34.4) | 77 (34.1) | 232 (34.3) |
| 15–25 y | 295 (65.6) | 149 (65.9) | 444 (65.7) |
| BMI, mean ± SD, kg/m2 | 19.4 ± 3.91 | 19.3 ± 3.67 | 19.3 ± 3.83 |
| Smoking status, No. (%) | |||
| Smoker | 0 (0.0) | 3 (1.3) | 3 (0.4) |
| Former smoker | 12 (2.7) | 3 (1.3) | 15 (2.2) |
| Nonsmoker | 438 (97.3) | 220 (97.3) | 658 (97.3) |
| Menarchal status, No. (%) | |||
| Postmenarchal | 321 (71.3) | 162 (71.7) | 483 (71.4) |
| Premenarchal | 129 (28.7) | 63 (27.9) | 192 (28.4) |
| Missing | 0 | 1 | 1 |
| Characteristic . | Vaccine (n = 450) . | Placebo (n = 226) . | Total (N = 676) . |
|---|---|---|---|
| Age, mean ± SD, y | 16.9 ± 4.36 | 16.8 ± 4.16 | 16.9 ± 4.29 |
| Age group, No. (%) | |||
| 10–14 y | 155 (34.4) | 77 (34.1) | 232 (34.3) |
| 15–25 y | 295 (65.6) | 149 (65.9) | 444 (65.7) |
| BMI, mean ± SD, kg/m2 | 19.4 ± 3.91 | 19.3 ± 3.67 | 19.3 ± 3.83 |
| Smoking status, No. (%) | |||
| Smoker | 0 (0.0) | 3 (1.3) | 3 (0.4) |
| Former smoker | 12 (2.7) | 3 (1.3) | 15 (2.2) |
| Nonsmoker | 438 (97.3) | 220 (97.3) | 658 (97.3) |
| Menarchal status, No. (%) | |||
| Postmenarchal | 321 (71.3) | 162 (71.7) | 483 (71.4) |
| Premenarchal | 129 (28.7) | 63 (27.9) | 192 (28.4) |
| Missing | 0 | 1 | 1 |
Abbreviations: BMI, body mass index; SD, standard deviation.
| Characteristic . | Vaccine (n = 450) . | Placebo (n = 226) . | Total (N = 676) . |
|---|---|---|---|
| Age, mean ± SD, y | 16.9 ± 4.36 | 16.8 ± 4.16 | 16.9 ± 4.29 |
| Age group, No. (%) | |||
| 10–14 y | 155 (34.4) | 77 (34.1) | 232 (34.3) |
| 15–25 y | 295 (65.6) | 149 (65.9) | 444 (65.7) |
| BMI, mean ± SD, kg/m2 | 19.4 ± 3.91 | 19.3 ± 3.67 | 19.3 ± 3.83 |
| Smoking status, No. (%) | |||
| Smoker | 0 (0.0) | 3 (1.3) | 3 (0.4) |
| Former smoker | 12 (2.7) | 3 (1.3) | 15 (2.2) |
| Nonsmoker | 438 (97.3) | 220 (97.3) | 658 (97.3) |
| Menarchal status, No. (%) | |||
| Postmenarchal | 321 (71.3) | 162 (71.7) | 483 (71.4) |
| Premenarchal | 129 (28.7) | 63 (27.9) | 192 (28.4) |
| Missing | 0 | 1 | 1 |
| Characteristic . | Vaccine (n = 450) . | Placebo (n = 226) . | Total (N = 676) . |
|---|---|---|---|
| Age, mean ± SD, y | 16.9 ± 4.36 | 16.8 ± 4.16 | 16.9 ± 4.29 |
| Age group, No. (%) | |||
| 10–14 y | 155 (34.4) | 77 (34.1) | 232 (34.3) |
| 15–25 y | 295 (65.6) | 149 (65.9) | 444 (65.7) |
| BMI, mean ± SD, kg/m2 | 19.4 ± 3.91 | 19.3 ± 3.67 | 19.3 ± 3.83 |
| Smoking status, No. (%) | |||
| Smoker | 0 (0.0) | 3 (1.3) | 3 (0.4) |
| Former smoker | 12 (2.7) | 3 (1.3) | 15 (2.2) |
| Nonsmoker | 438 (97.3) | 220 (97.3) | 658 (97.3) |
| Menarchal status, No. (%) | |||
| Postmenarchal | 321 (71.3) | 162 (71.7) | 483 (71.4) |
| Premenarchal | 129 (28.7) | 63 (27.9) | 192 (28.4) |
| Missing | 0 | 1 | 1 |
Abbreviations: BMI, body mass index; SD, standard deviation.
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