Table 5 Sequential regression with total activities of daily living score as the outcome.

Step	Variable	R2	R2 change	F change**	β	p Value
1		0.06	0.06	8.76
	Age				−0.19	<0.001
	Sex				0.10	0.032
	Education				0.14	0.003
2		0.18	0.12	68.75
	Age				−0.15	<0.001
	Sex				0.10	0.021
	Education				0.13	0.002
	UPDRS‐III motor				−0.35	<0.001
3		0.26	0.08	26.06
	Age				−0.11	<0.001
	Sex				0.10	0.008
	Education				0.05	0.014
	UPDRS‐III motor				−0.31	0.227
	Verbal interaction				−0.19	<0.001
	Verbal cognitive				−0.24	<0.001
4		0.38	0.12	80.90
	Age				−0.09	0.018
	Sex				0.17	<0.001
	Education				0.11	0.008
	UPDRS‐III motor				−0.26	<0.001
	Verbal interaction				−0.20	<0.001
	Verbal cognitive				−0.23	<0.001
	Attention				−0.35	<0.001

UPDRS, Unified Parkinson's Disease Rating Scale.

β is standardised.

**F change significant at p<0.01.