Table 2

The association between childhood cognitive ability and long-term sickness absence in three British birth cohorts

Model 1: unadjustedModel 2: adjusted for sex, paternal social classModel 2 + adult social classModel 2 + educational attainmentModel 2 + depressionAdjusted for all covariables
OR (95% CI)p ValueOR (95% CI)p ValueOR (95% CI)p ValueOR (95% CI)p ValueOR (95% CI)p ValueOR (95% CI)p Value
1946 cohort
 Cognition0.66 (0.53 to 0.82)<0.0010.70 (0.56 to 0.86)0.0010.78 (0.63 to 0.98)0.040.80 (0.63 to 1.02)0.070.69 (0.56 to 0.86)0.0010.84 (0.66 to 1.07)0.15
 Quartile 1 (least able)111111
 Quartile 20.77 (0.46 to 1.29)0.320.84 (0.50 to 1.42)0.520.98 (0.57 to 1.67)0.930.95 (0.56 to 1.61)0.840.84 (0.50 to 1.41)0.511.02 (0.60 to 1.74)0.94
 Quartile 30.49 (0.27 to 0.88)0.020.54 (0.30 to 0.96)0.040.65 (0.36 to 1.19)0.170.67 (0.36 to 1.24)0.210.52 (0.29 to 0.95)0.030.71 (0.38 to 1.33)0.29
 Quartile 4 (most able)0.26 (0.11 to 0.58)0.0010.31 (0.13 to 0.70)0.0050.44 (0.18 to 1.05)0.060.45 (0.18 to 1.11)0.090.30 (0.13 to 0.69)0.0050.53 (0.21 to 1.33)0.17
1958 cohort
 Cognition0.68 (0.60 to 0.76)<0.0010.69 (0.61 to 0.77)<0.0010.69 (0.61 to 0.78)<0.0010.77 (0.67 to 0.90)0.0010.72 (0.64 to 0.81)<0.0010.79 (0.68 to 0.92)0.002
 Quartile 1 (least able)111111
 Quartile 20.67 (0.51 to 0.88)0.0040.68 (0.52 to 0.89)0.0050.68 (0.52 to 0.90)0.0060.78 (0.59 to 1.03)0.090.72 (0.54 to 0.94)0.020.81 (0.61 to 1.07)0.13
 Quartile 30.43 (0.31 to 0.59)<0.0010.44 (0.32 to 0.61)<0.0010.45 (0.33 to 0.62)<0.0010.56 (0.40 to 0.79)0.0010.49 (0.35 to 0.68)<0.0010.60 (0.42 to 0.84)0.003
 Quartile 4 (most able)0.32 (0.22 to 0.48)<0.0010.35 (0.24 to 0.52)<0.0010.36 (0.24 to 0.54)<0.0010.49 (0.30 to 0.81)0.0050.39 (0.26 to 0.59)<0.0010.53 (0.32 to 0.86)0.01
1970 cohort
 Cognition0.78 (0.64 to 0.94)0.010.80 (0.66 to 0.97)0.030.84 (0.69 to 1.03)0.10.85 (0.70 to 1.02)0.080.80 (0.66 to 0.98)0.030.87 (0.72 to 1.05)0.15
 Quartile 1 (least able111111
 Quartile 20.94 (0.48 to 1.82)0.850.97 (0.50 to 1.88)0.931.03 (0.52 to 2.03)0.931.0 (0.51 to 1.94)0.990.97 (0.50 to 1.87)0.921.03 (0.52 to 2.02)0.93
 Quartile 30.71 (0.44 to 1.15)0.170.74 (0.46 to 1.21)0.240.82 (0.50 to 1.34)0.430.80 (0.50 to 1.29)0.370.75 (0.46 to 1.22)0.240.82 (0.50 to 1.34)0.43
 Quartile 4 (most able)0.44 (0.21 to 0.90)0.030.48 (0.24 to 0.98)0.040.56 (0.26 to 1.19)0.130.57 (0.28 to 1.12)0.100.48 (0.24 to 0.98)0.040.56 (0.26 to 1.19)0.13