Table 3.

Multivariate analysis using logistic regression for impaired cognitive function according to the Modified Mini Mental Status Examination (MMMSE) and Modified Mini Mental Examination plus Pfeffer Functional Activity Questionnaire (PFAQ) among older Chilean adults (>65 years) who participated in the 2009–2010 National Health Survey

					95 % CI
Variable	β	se	P	OR	Lower	Upper
MMMSE
Intercept	−5·589	2·54	0·028	–	–	–
EDUL (Basic)	1·610	0·739	0·030	5·002	1·172	21·353
EDUL (Medium)	0·575	0·804	0·475	1·777	0·367	8·608
Hypertension (Yes)	1·085	0·423	0·011	2·958	1·289	6·791
Age	0·063	0·027	0·022	1·065	1·009	1·123
SF	−0·150	0·067	0·026	*	*	*
SF2	0·003	0·001	0·039	*	*	*
Diabetes	0·914	0·422	0·031	2·493	1·088	5·713
Vitamin B12	0·002	0·001	0·037	1·002	1·000	1·003
MMMSE plus PFAQ
Intercept	−6·766	3·603	0·061	–	–	–
Gender (Male)	1·524	0·5	0·002	4·592	1·721	12·256
Area (Urban)	−1·582	0·61	0·010	0·206	0·062	0·681
Diabetes (Yes)	1·233	0·592	0·038	3·432	1·074	10·968
Hypertension (Yes)	1·716	0·955	0·073	5·564	0·854	36·253
Age	0·086	0·04	0·032	1·537	1·038	2·275
SF	−0·241	0·097	0·014	*	*	*
SF2	0·005	0·002	0·005	*	*	*
Vitamin B12	0·008	0·003	0·002	*	*	*
SF×vitamin B12	0·00028	0·0001	0·049	*	*	*

EDUL, educational level; SF, serum folate.

*OR have been omitted since they depend on the values of at least one of the identified variables.