. 2020 Feb 10;50:85–94. doi: 10.1016/j.breast.2020.02.005

Table 3.

Nested mixed effects model (model 1).

		β-value	LCI	UCI	p-value
Intercept	$β_{0}$	561.803	518.290	605.315	<0.001	***
x	$β_{1}$	16.650	−12.882	46.181	0.268
x²	$β_{2}$	37.617	21.529	53.706	<0.001	***
x³	$β_{3}$	−40.270	−60.876	−19.664	<0.001	***
x⁴	$β_{4}$	8.374	3.350	13.398	0.001	**

Standardized time variable (x) = . $\frac{t i m e - m e a n}{s t a n d a r d d e v i a t i o n}$

LCI = lower confidential interval, UCI = upper confidential interval.

p-values <0.05 = *, p < 0.01 = ** and p < 0.001 = ***.