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Table 1 Individual characteristics of dementia cases and controls

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

Individual characteristics
Gender    1.0000e
Age (years)1.0000e
 Mean ± SDb79.3 ± 7.079.0 ± 7.0 
Occupational status<.0001e
 white collar309511.8332012.7 
 blue collar983937.510,33239.4 
Salary-based insurance premium (NTD)b  <.0001e
  < Median (19,200)667325.6615323.5 
 Mean ± SDb,c8095.0 ± 11,038.58736.0 ± 11,752.3 
Number of comorbidities d<.0001e
  1. a Inconsistency between total population and population summed for individual variables was due to missing information
  2. bSD Standard deviation, NTD New Taiwan Dollars
  3. c The dependent insurers were not included
  4. 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
  5. e Based on χ2 test for category variables