Table 1

 Multivariate multi-level logistic regression analyses of pupil and school characteristics for the uptake of at least two doses and three doses of hepatitis B vaccine

Total no. of pupilsUptake of at least 2 dosesUptake of 3 doses
N1 (%)N2 (% of N1)Odds ratio (95% CI)N3 (% of N1)Odds ratio (95% CI)
*A deprivation category for each pupil was derived from the Carstairs score, based on an individual’s postcode sector of residence.
The deprivation scores were based on the 1991 census.4
†Ethnicity was assigned to each pupil as the percentage of their school’s secondary one population that was Caucasian (e.g. 1433 pupils attended schools where 60–79.9% of the pupils in the class were Caucasian).
‡Absenteeism was assigned to each pupil as the average percentage of secondary one pupils absent from their school on any school day during the academic year 2001/2002.
Pupil characteristics
Gender
    Male5491 (50.7)4804 (87.5)1.00 baseline4301 (78.3)1.00 baseline
    Female5341 (49.3)4863 (91.0) 1.46 (1.28 to 1.66) 4378 (82.0) 1.25 (1.13 to 1.38)
Deprivation category*
    Low (Carstairs 1–3)3184 (29.4)2973 (93.4)1.00 baseline2830 (88.9)1.00 baseline
    Medium (Carstairs 4–5)2290 (21.1)2064 (90.1) 0.74 (0.59 to 0.92) 1873 (81.8) 0.68 (0.56 to 0.81)
    High (Carstairs 6–7)5348 (49.4)4630 (86.6) 0.56 (0.45 to 0.68) 3976 (74.3) 0.47 (0.40 to 0.55)
    Unknown10 (0.09)
School characteristics
School type
    State9931 (91.7)8860 (89.2)1.00 baseline7922 (79.8)1.00 baseline
    Independent696 (6.4)645 (92.7)1.06 (0.67 to 1.70)621 (89.2)1.15 (0.79 to 1.68)
    Special education needs205 (1.9)162 (79.0) 0.55 (0.36 to 0.85) 136 (66.3) 0.57 (0.40 to 0.82)
    Mixed10602 (97.9)9460 (89.2)1.00 baseline8483 (80.0)1.00 baseline
    Single sex230 (2.1)207 (90.0)1.02 (0.55 to 1.88)196 (85.2)1.30 (0.77 to 2.20)
    Non-denomination7302 (67.4)6559 (89.8)1.00 baseline5921 (81.1)1.00 baseline
    Roman Catholic3530 (32.6)3108 (88.0)0.83 (0.68 to 1.02)2758 (78.1)0.89 (0.75 to 1.05)
Ethnicity†
    95–100%1775 (16.4)1591 (89.6)1.00 baseline1411 (79.5)1.00 baseline
    90–94.9%3821 (35.3)3482 (91.1)0.87 (0.65 to 1.17)3169 (82.9)0.94 (0.74 to 1.20)
    85–89.9%2778 (25.6)2452 (88.3) 0.72 (0.54 to 0.95) 2192 (78.9) 0.79 (0.62 to 0.99)
    80–84.9%1025 (9.5)911 (88.9) 0.66 (0.45 to 0.96) 832 (81.2)0.81 (0.59 to 1.12)
    60–79.9%1433 (13.2)1231 (85.9) 0.62 (0.44 to 0.86) 1075 (75.0) 0.71 (0.54 to 0.95)
Absenteeism‡
    1.6–9.9%6659 (61.5)6045 (90.8)1.00 baseline5554 (83.4)1.00 baseline
    10–17.05%3981 (36.8)3451 (86.7) 0.77 (0.63 to 0.95) 2957 (74.3) 0.72 (0.61 to 0.86)
    Unknown192 (1.8)