Parameters in the parsimonious model | Coefficient estimate | Standard error | t‐statistic | P value |
---|---|---|---|---|
Age group 18–24 years old | ||||
Intercept (β0) | 14.31 | 0.76 | 18.85 | < .0001 |
Baseline slope (β1) | − 0.51 | 0.12 | − 4.24 | 0.001 |
Level change after intervention (β2) | − 6.17 | 1.30 | − 4.76 | 0.00 |
β2/β1 | 12.10 | |||
Age group 25–29 years old | ||||
Intercept (β0) | 19.54 | 1.12 | 17.51 | < .0001 |
Baseline slope (β1) | − 0.75 | 0.18 | − 4.24 | 0.001 |
Level change after intervention (β2) | − 7.97 | 1.91 | − 4.18 | 0.00 |
β2/β1 | 10.63 | |||
Age group 30–39 years old | ||||
Intercept (β0) | 27.76 | 1.82 | 15.24 | < .0001 |
Baseline slope (β1) | − 1.26 | 0.29 | − 4.35 | 0.001 |
Level change after intervention (β2) | − 7.06 | 3.11 | − 2.27 | 0.04 |
β2/β1 | 5.60 | |||
Age group 40–49 years old | ||||
Intercept (β0) | 11.64 | 0.95 | 12.22 | < .0001 |
Baseline slope (β1) | − 0.59 | 0.15 | − 3.88 | 0.002 |
Level change after intervention (β2) | − 1.27 | 1.63 | − 0.78 | 0.45 |
Age group 50–59 years old | ||||
Intercept (β0) | 2.60 | 0.26 | 10.15 | < .0001 |
Baseline slope (β1) | − 0.14 | 0.04 | − 3.41 | 0.004 |
Level change after intervention (β2) | 0.09 | 0.44 | 0.22 | 0.83 |