n | Deaths (n) | Cox regression analysis Relative risks (HR) of premature mortality with 95% CI | Laplace regression analysis Absolute differences (years) in survival time with 95% CI | |||
Unadjusted | Adjusted* | Unadjusted | Adjusted* | |||
OHC | ||||||
No OHC (ref) | 13 648 | 607 | 1 | 1 | 0 | 0 |
OHC | 1049 | 103 | 2.28 (1.85 to 2.81) | 1.82 (1.43 to 2.32) | −10.50 (−13.2 to -7.78) | −7.45 (−10.7 to –4.19) |
Grade 6 marks (age 13) | ||||||
No OHC + marks above average (ref) | 7946 | 280 | 1 | 1 | 0 | 0 |
No OHC + marks at or below average | 4931 | 277 | 1.61 (1.37 to 1.90) | 1.46 (1.23 to 1.73) | −6.19 (−8.33 to -4.05) | −4.88 (−7.06 to –2.70) |
No OHC + no marks | 771 | 50 | 1.87 (1.38 to 2.52) | 1.85 (1.36 to 2.51) | −8.10 (−12.0 to -4.19) | −7.92 (−11.9 to –3.94) |
OHC + marks above average | 390 | 29 | 2.16 (1.47 to 3.17) | 1.90 (1.29 to 2.81) | −9.92 (−14.6 to -5.26) | −8.25 (−13.2 to –3.32) |
OHC + marks at or below average | 541 | 60 | 3.29 (2.49 to 4.34) | 2.48 (1.80 to 3.40) | −15.2 (−19.0 to -11.5) | −11.5 (−15.8 to –7.15) |
OHC + no marks | 118 | 14 | 3.55 (2.07 to 6.09) | 2.81 (1.59 to 4.97) | −16.1 (−23.1 to -9.15) | −12.9 (−20.1 to –5.70) |
Grade 9 marks (age 16) | ||||||
No OHC + marks above average (ref) | 7236 | 236 | 1 | 1 | 0 | 0 |
No OHC + marks at or below average | 5142 | 277 | 1.67 (1.40 to 1.99) | 1.61 (1.35 to 1.93) | −6.64 (−8.88 to -4.41) | −6.12 (−8.42 to –3.81) |
No OHC + no marks | 1270 | 94 | 2.31 (1.82 to 2.93) | 2.28 (1.79 to 2.90) | −10.9 (−14.0 to -7.72) | −10.5 (−13.7 to –7.35) |
OHC + marks above average | 324 | 15 | 1.42 (0.85 to 2.39) | 1.23 (0.72 to 2.10) | −4.63 (−11.9 to 2.63) | −2.75 (−10.2 to 4.70) |
OHC + marks at or below average | 471 | 49 | 3.33 (2.44 to 4.53) | 2.76 (1.96 to 3.89) | −15.4 (−19.2 to -11.5) | −12.8 (−17.2 to –8.39) |
OHC + no marks | 254 | 39 | 5.07 (3.60 to 7.12) | 4.08 (2.82 to 5.90) | −20.5 (−25.1 to -16.0) | −17.4 (−22.3 to –12.5) |
Grade 12 marks (age 19) | ||||||
No OHC + marks above average (ref) | 4371 | 128 | 1 | 1 | 0 | 0 |
No OHC + marks at or below average | 2267 | 69 | 1.04 (0.78 to 1.39) | 0.94 (0.70 to 1.26) | 0.43 (−4.21 to 3.35) | 0.77 (−3.04 to 4.57) |
No OHC + no marks | 7010 | 410 | 2.02 (1.66 to 2.47) | 2.01 (1.64 to 2.47) | −9.00 (−11.6 to -6.42) | −9.01 (−11.7 to –6.32) |
OHC + marks above average | 143 | 6 | 1.45 (0.64 to 3.29) | 1.32 (0.58 to 3.04) | −4.63 (−18.2 to 8.98) | −3.63 (−17.4 to 10.1) |
OHC + marks at or below average | 97 | 8 | 2.91 (1.42 to 5.98) | 2.46 (1.17 to 5.18) | −13.5 (−23.4 to -3.66) | −11.4 (−21.5 to –1.22) |
OHC + no marks | 809 | 89 | 3.93 (2.99 to 5.15) | 3.37 (2.48 to 4.59) | −17.3 (−20.8 to -13.8) | −15.4 (−19.5 to –11.3) |
Total | 14 697 | 710 |
Statistically significant (p<0.05) estimates are in bold.
*Adjusted for sex, household occupational class, household economic poverty, maternal age and maternal marital status.
OHC, out of-home care; ref, reference group.