Table 8.

Linear regression analyses of behavioral items and profiles in RTT

Cohort	Behavior item or subscale	R2	F	Standardized β	Sig.
All RTT	CHQ MH	0.000	0.495	−0.013	0.482
	Felt like crying↑	0.006	18.367	0.079	0.000***
	Felt lonely↓	0.002	6.470	−0.047	0.011*
	Acted nervous↑	0.003	9.257	0.056	0.002**
	Acted bothered or upset	0.001	1.742	0.024	0.187
	Irritability↓	0.011	54.597	−0.107	0.000***
	Self-mutilation	0.000	0.497	−0.010	0.481
	Aggressive behavior↓	0.006	27.593	−0.076	0.000***
	Biting self & others↓	0.013	59.958	−0.112	0.000***
Internalizing-only	CHQ MH	0.003	3.699	0.052	0.055
	Felt like crying↑	0.015	20.208	0.121	0.000***
	Felt lonely	0.002	2.669	0.044	0.103
	Acted nervous↑	0.010	14.463	0.102	0.000***
	Acted bothered or upset↑	0.004	5.413	0.063	0.020*
	Irritability	0.001	1.577	−0.028	0.209
	Self-mutilation↑	0.004	7.144	0.059	0.008**
	Aggressive behavior	0.000	0.605	−0.017	0.437
	Biting self & others	0.001	2.607	−0.036	0.107
Mixed	CHQ MH↓	0.015	19.88	−0.124	0.000***
	Felt like crying	0.000	0.057	0.007	0.812
	Felt lonely↓	0.173	39.174	−0.173	0.000***
	Acted nervous	0.012	0.18	−0.012	0.671
	Acted bothered or upset	0.002	2.414	−0.043	0.121
	Irritability↓	0.012	21.937	−0.107	0.000***
	Self-mutilation	0.001	1.827	−0.031	0.177
	Aggressive behavior ↓	0.005	8.999	−0.069	0.003**
	Biting self & others↓	0.015	28.546	−0.122	0.000***

Note. Analyses of entire RTT cohort, regardless of clinical presentation. Bold text indicates significance.

^*p <.05

^**p <.01

^***p <.001;

^↑= increase over time

^↓= decrease over time for significant items.