Table 2

Bivariate correlations (N=8218)

Variables	Sex (1=M; 2=F)	Social class at birth	Cognitive ability at 7	Attention problems at 7	Conduct problems at 7	Childhood conscientiousness	Social class at 50	Qualifications at 50	Conscientiousness at 50
Social class at birth (1=highest; 6=lowest)	0.01
Cognitive ability at 7 (1=lowest; 5=highest)	0.03*	−0.12**
Attention problems at 7 (1=lowest; 3=highest)	−0.04**	0.06**	−0.10**
Conduct problems at 7	−0.18**	0.10**	−0.16**	0.15**
Childhood conscientiousness	0.11**	−0.13**	0.10**	−0.09**	−0.19**
Social class at 50 (1=highest; 6=lowest)	<0.01	0.21**	−0.17**	0.06**	0.15**	−0.20**
Qualifications at 50 (0=lowest; 5=highest)	−0.03*	−0.24**	0.20**	−0.09**	−0.20**	0.30**	−0.46**
Conscientiousness at 50	0.10**	−0.05**	0.05**	−0.01	−0.09**	0.15**	−0.10**	0.08**
Smoking at 50 (0=No; 1=Yes)	<0.01	0.10**	−0.05**	0.04**	0.09**	−0.21**	0.15**	−0.16**	−0.05**