Table 1

Determinants of attending ASE (logistic regression, OR and 95% CI)

BivariateFull modelParsimonious
Sociodemographic variables
Being a girl0.99 (0.73 to 1.36)0.90 (0.61 to 1.31)
Age at survey (vs 13–14)
 ≤121.26 (0.86 to 1.84)1.09 (0.68 to 1.75)
 ≥150.83 (0.58 to 1.21)0.97 (0.61 to 1.53)
Region of residence (vs North Rhine-Westphalia (largest state by inhabitants))
 North-west0.78 (0.46 to 1.31)0.90 (0.48 to 1.67)
 South-west0.73 (0.45 to 1.19)0.67 (0.37 to 1.23)
 Bavaria0.47 (0.27 to 0.82)0.46 (0.24 to 0.91)
 North-east0.54 (0.29 to 1.01)0.68 (0.32 to 1.45)
 Saxony, Thuringia0.57 (0.33 to 0.97)0.80 (0.42 to 1.53)
 Austria, other0.31 (0.12 to 0.81)0.34 (0.11 to 1.07)
Parental socioeconomic status (vs middle)
 Low0.31 (0.20 to 0.49)0.31 (0.19 to 0.52)0.30 (0.18 to 0.50)
 High6.96 (4.14 to 11.68)7.95 (4.54 to 13.93)8.16 (4.7 to 14.16)
Family situation (vs ‘classic’ family)
 Single parent0.32 (0.19 to 0.55)0.54 (0.28 to 1.02)0.52 (0.28 to 0.97)
 Other or unknown0.61 (0.35 to 1.08)1.18 (0.61 to 2.28)1.21 (0.63 to 2.32)
Immigration background1.21 (0.59 to 2.47)2.88 (1.19 to 6.94)2.93 (1.23 to 6.97)
Single child1.25 (0.82 to 1.91)1.29 (0.77 to 2.15)
School-related variables
Periods off school (vs never or very rarely)
 Occasionally0.98 (0.69 to 1.41)1.05 (0.67 to 1.65)1.00 (0.66 to 1.53)
 Often0.72 (0.44 to 1.18)0.63 (0.33 to 1.20)0.67 (0.37 to 1.20)
Perceived compromised by inflammatory bowel disease at school (vs not compromised)
 Slightly, occasionally1.02 (0.73 to 1.43)0.93 (0.59 to 1.45)
 Substantially, frequently0.91 (0.57 to 1.45)0.95 (0.50 to 1.81)
Health-related variables
Age diagnosis*disease duration (vs 10+, >2 years duration)
 0–5 versus 10+0.91 (0.53 to 1.57)0.68 (0.33 to 1.42)0.75 (0.39 to 1.44)
 6–9 versus 10+1.00 (0.66 to 1.50)0.93 (0.55 to 1.57)0.97 (0.61 to 1.55)
 10+,<2 years duration1.24 (0.82 to 1.88)1.15 (0.67 to 1.95)1.20 (0.73 to 1.97)
Poor or moderate current health status (vs good)0.90 (0.65 to 1.24)0.84 (0.54 to 1.30)
Active disease course (vs remission during last year)1.14 (0.83 to 1.57)1.40 (0.90 to 2.19)1.36 (0.92 to 2.02)