Effects of physical and social environments on the risk of dementia among Taiwanese older adults: a population-based case-control study

Table 1 Individual characteristics of dementia cases and controls

Variables^a	Dementia		Control		p
Variables^a	n	%	n	%	p
Individual characteristics
Gender					1.0000^e
Men	11,873	45.3	11,873	45.3
Female	14,333	54.7	14,333	54.7
Age (years)					1.0000^e
65–69	2496	9.5	2496	9.5
70–74	4614	17.6	4614	17.6
75–79	6078	23.2	6078	23.2
80–84	6813	26.0	6813	26.0
≧80	6205	23.7	6205	23.7
Mean ± SD^b	79.3 ± 7.0		79.0 ± 7.0
Occupational status					<.0001^e
white collar	3095	11.8	3320	12.7
blue collar	9839	37.5	10,332	39.4
others	13,272	50.7	12,554	47.9
Salary-based insurance premium (NTD)^b					<.0001^e
dependent	9714	37.3	9667	36.9
< Median (19,200)	6673	25.6	6153	23.5
≧Median	9679	37.1	10,386	39.6
Mean ± SD^b,c	8095.0 ± 11,038.5		8736.0 ± 11,752.3
Number of comorbidities ^d					<.0001^e
0	6058	23.1	7885	30.1
1–2	12,290	46.9	12,334	47.1
≧ 3	7858	30.0	5987	22.9
Total	26,206	100.0	26,206	100.0

^a Inconsistency between total population and population summed for individual variables was due to missing information
^bSD Standard deviation, NTD New Taiwan Dollars
^c The dependent insurers were not included
^d Number of comorbidities included hypertension, diabetes, heart disease (i.e., coronary artery disease or congestive heart failure), stroke, head injury, hyperlipidemia, depression, and chronic obstructive pulmonary disease
^e Based on χ² test for category variables

ISSN: 1471-2318