Mixed model for longitudinal trends in serum cortisol levels among a bi-ethnic cohort of children
| Model 1 | Model 2 | |||||
| B | SE | β | B | SE | β | |
| Age (Tanner 1) | −0.014 | 0.014 | −1.00 | −0.025 | 0.016 | −1.56 |
| Age (Tanner 2) | −0.020* | 0.012 | −1.67 | −0.028** | 0.014 | −2.00 |
| Age (Tanner 3) | −0.014 | 0.012 | −1.16 | −0.023* | 0.013 | −1.76 |
| Age (Tanner 4 and 5) | −0.011 | 0.011 | −1.00 | −0.016 | 0.012 | −1.33 |
| Total fat mass | −0.048 | 0.030 | −1.60 | −0.034 | 0.033 | −1.03 |
| Gender, female | −0.014 | 0.045 | −0.31 | 0.004 | 0.047 | 0.085 |
| Neighbourhood index | −0.018* | 0.011 | −1.64 | |||
| Log likelihood | 396.3 | 350.5 | ||||
| χ2 | 34.36 | 31.33 | ||||
| p Value | 0.001 | 0.001 | ||||
Age (Tanner) refers to Tanner stage nested in age.
Neighbourhood index consisted of z-score tabulations of percentage of unemployment, poverty, single female-headed households with dependent children and percentage of vacant housing.
Significance levels were set at *p<0.05; **p<0.01.
B, unstandardised coefficient; β, standardised coefficient.