Z-scores of the final cluster solution in boys and socio-demographic correlates.

SES = socio-economic status ** p < .01 a significantly different to M1 (p<0.0017) b significantly different to M2 (p<0.0017) c significantly different to M3 (p<0.0017) d significantly different to M4 (p<0.0017) e significantly different to M6 (p<0.0017) f significantly different to M7 (p<0.0017) g significantly different to M8 (p<0.0017) Z-scores of the final cluster solution in boys and socio-demographic correlates.