Table 5.

Model parameters of the regression model predicting overall digital maturity (N=219).

Model number	Included variablesa	F (dfM, dfR)	P value	R 2	ΔR2	ΔP value
1	Demographics and practice-related characteristics	0.865 (16,202)	.61	0.064	0.064	.61
2	Demographics, practice-related characteristics, and digital health use	1.274 (21,197)	.20	0.120	0.056	.03
3	Demographics, practice-related characteristics, digital health use, and digital affinity	2.676 (23,195)	.001	0.240	0.120	.001
4	Demographics, practice-related characteristics, digital health use, digital affinity, and personality	3.029 (28,190)	.001	0.309	0.069	.003

^aThe models with their respective variables that were included in the different stages of our approach are as follows: model 1 (gender, age dummy coded, practice location size dummy coded, professional experience dummy coded, and practice type dummy coded), model 2 (model 1 variables, current use dummy coded, and expected future use); model 3 (model 2 variables, perceived digital affinity of medical assistants, and general practitioners’ digital affinity) and model 4 (model 3 variables, extraversion, agreeableness, conscientiousness, neuroticism, and openness).