Variables collected | Base-line | Lost to follow-up | Relative risk of lost to follow-up | ||||||
---|---|---|---|---|---|---|---|---|---|
In 2001 | N | n | % | RRcrude 1 | 95% CI | RRadj 1,2 | 95% CI | ||
Gender 3 | |||||||||
Boys | 2894 | 1455 | 50 | Ref | Ref | ||||
Girls | 2835 | 958 | 34 | 0.67 | 0.63 | 0.72 | 0.72 | 0.67 | 0.77 |
Ethnicity 4 | |||||||||
Western | 4768 | 1948 | 41 | Ref | Ref | ||||
Non western | 896 | 428 | 48 | 1.17 | 1.08 | 1.26 | 1.31 | 1.21 | 1.43 |
Invitation group | |||||||||
Oslo school | 2493 | 388 | 16 | Ref | |||||
Oslo post | 1145 | 761 | 66 | 4.27 | 3.86 | 4.72 | |||
Hedmark post | 1710 | 883 | 52 | 3.32 | 3.00 | 3.68 | |||
Education plans | |||||||||
University/higher | 2847 | 911 | 32 | Ref | Ref | ||||
Other | 1940 | 1119 | 58 | 1.80 | 1.69 | 1.93 | 1.23 | 1.15 | 1.33 |
Not decided yet | 859 | 336 | 39 | 1.22 | 1.11 | 1.35 | 1.07 | 0.96 | 1.18 |
Family economic situation | |||||||||
Bad | 184 | 108 | 59 | Ref | Ref | ||||
Average | 1824 | 847 | 46 | 0.79 | 0.69 | 0.90 | 0.86 | 0.75 | 0.99 |
Good | 3014 | 1155 | 38 | 0.65 | 0.57 | 0.74 | 0.82 | 0.71 | 0.94 |
Very good | 620 | 266 | 43 | 0.73 | 0.63 | 0.85 | 0.95 | 0.81 | 1.12 |
Education father | |||||||||
Lower secondary | 786 | 381 | 48 | Ref | Ref | ||||
Upper secondary | 2470 | 1082 | 44 | 0.90 | 0.83 | 0.98 | 0.97 | 0.89 | 1.05 |
University/College | 1837 | 471 | 26 | 0.53 | 0.48 | 0.59 | 0.79 | 0.71 | 0.87 |
Income father | |||||||||
Low | 1190 | 585 | 49 | Ref | Ref | ||||
Medium | 2654 | 1011 | 38 | 0.77 | 0.72 | 0.84 | 0.84 | 0.78 | 0.90 |
High | 1161 | 304 | 26 | 0.53 | 0.48 | 0.60 | 0.80 | 0.72 | 0.88 |
Parents' marital status | |||||||||
Married | 3891 | 1518 | 39 | Ref | Ref | ||||
Not married | 1806 | 876 | 49 | 1.24 | 1.17 | 1.32 | 1.13 | 1.06 | 1.21 |