TABLE 3.

Regression analysis of predictors of CSF Aβ levels (Ecog‐Lang1 as the main IV)

	Model 1	Model 2	Model 3
Ecog‐Lang 1(1/3)	Ref	Ref	Ref
Ecog‐Lang 1(2/3)	–7.501	–8.048	–5.106
	(7.052)	(7.301)	(7.184)
Ecog‐Lang 1(3/3)	–29.816**	–31.555**	–26.906*
	(9.431)	(11.106)	(10.902)
ECog total score (without Lang1//Lang3)		.093	–.013
		(.312)	(.318)
Sex			–15.885*
			(6.606)
Age			–1.652**
			(.526)
Years of education			2.022
			(1.311)
Geriatric Depression Scale (GDS)			2.191
			(2.927)
Anxiety score			–4.037
			(4.509)
Constant	206.071***	201.899***	315.152***
	(5.314)	(14.978)	(50.761)

Note: Standard errors in parentheses.

^* P < .05

^** P < .01

^*** P < .001.

Abbreviations: Aβ, amyloid beta; CSF, cerebrospinal fluid; ECog, Everyday Cognition questionnaire; IV, instrumental variable.