Description of the sample at baseline and follow-up
| Variables | Baseline (n=606)* | Follow-up (n=214)* | ||
|---|---|---|---|---|
| [% (n)] | [% (n)] | |||
| Categorical variables | ||||
| Ethnicity | ||||
| White | 54.5 (330) | 65.9 (141) | ||
| Asian | 18.2 (110) | 17.8 (38) | ||
| Black | 12.7 (77) | 3.3 (7) | ||
| Other | 11.2 (68) | 11.7 (25) | ||
| Religion | ||||
| Christian | 40.1 (243) | 38.3 (82) | ||
| None | 33.0 (200) | 36.4 (78) | ||
| Muslim | 13.4 (81) | 16.4 (35) | ||
| Other | 11.2 (68) | 8.4 (18) | ||
| Someone close diagnosed with cancer? | ||||
| No | 35.5 (215) | 36.4 (78) | ||
| Yes | 61.6 (373) | 62.1 (133) | ||
| Someone close diagnosed with cervical cancer? | ||||
| No | 88.4 (536) | 90.7 (194) | ||
| Yes | 8.4 (51) | 7.9 (17) | ||
| Smoking status | ||||
| No | 77.1 (467) | 86.4 (185) | ||
| Yes | 19.8 (120) | 12.6 (27) | ||
| Entitled to EMA? | ||||
| No (high-income household) | 51.8 (314) | 62.1 (133) | ||
| Yes (low- income household) | 44.6 (270) | 36.0 (77) | ||
| Sexually active | ||||
| No | 56.4 (342) | 62.1 (133) | ||
| Yes | 41.3 (250) | 35.5 (76) | ||
| Age of sexual debut | ||||
| 16 years and above | 20.1 (122) | 16.4 (35) | ||
| 15 years and below | 20.6 (125) | 19.2 (41) | ||
| Intention | ||||
| High | 67.2 (407) | 75.2 (161) | ||
| Low | 32.8 (199) | 24.8 (53) | ||
| Continuous variables | α | Range | Mean (SD) | Mean (SD) |
| HPV knowledge | 0.72 | 0–15 | 8.00 (3.18) | 8.87 (2.96) |
| Positive vaccine attitude | 0.69 | 0–12 | 9.76 (1.85) | 10.17 (1.45) |
| Needle fear | 0–4 | 1.82 (1.46) | 1.63 (1.46) | |
| Parental acceptance | 0–4 | 3.13 (0.91) | 3.28 (0.79) | |
| Normative beliefs about HPV vaccine | ||||
| Friends | 0–4 | 2.80 (0.87) | 2.83 (0.76) | |
| Parent | 0–4 | 2.91 (0.95) | 3.02 (0.85) | |
| Vaccine safety | 0–4 | 2.66 (0.68) | 2.78 (0.63) | |
| Vaccine effectiveness against: | ||||
| HPV | 0–4 | 2.56 (0.66) | 2.87 (0.61) | |
| Cervical cancer | 0–4 | 2.72 (0.64) | 2.67 (0.65) | |
| Sexually transmitted infections | 0–4 | 1.67 (0.95) | 1.58 (1.00) | |
| Perceived severity of: | ||||
| HPV | 0.95 | 0–12 | 7.60 (2.73) | 7.73 (2.86) |
| Cervical cancer | 0.97 | 0–12 | 10.22 (2.30) | 10.43 (2.17) |
| Perceived susceptibility to: | ||||
| HPV | 0–4 | 2.31 (0.87) | 2.31 (0.88) | |
| Cervical cancer | 0–4 | 2.29 (0.87) | 2.28 (0.84) | |
| Discussing sex with parents | 0.83 | 0–4 | 2.14 (2.74) | 2.20 (1.53) |
*Note that n varies slightly between items because of missing data.
EMA, Educational Maintenance Allowance; HPV, human papillomavirus; SD, standard deviation.