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Table 2 Prevalence of CIND and dementia by socio-demographic characteristics and comorbidity

From: Prevalence and pattern of cognitive impairment in rural and urban populations from Northern Portugal

  CIND Dementia
Characteristics N No cases Prev (%) 95% CI No cases Prev (%) 95% CI
All 1146 141 12.3 10.4-14.4 31 2.7 1.9-3.8
   Residence
Rural 713 96 13.5 11.1-16.2 24 3.4 2.3-5.0
Urban 433 45 10.4 7.9-13.6 7 1.6 0.8-3.3
   Age (years)
55-59 228 22 9.6 6.5-14.2 1 0.4 0.1-2.4
60-64 258 21 8.1 5.4-12.1 4 1.6 0.6-3.9
65-69 258 28 10.9 7.6-15.2 4 1.6 0.6-3.9
70-74 237 37 15.6 11.5-20.8 10 4.2 2.3-7.6
75-79 165 33 20.0 14.6-26.8 12 7.3 4.2-12.3
   Gender
Men 462 44 9.5 7.2-12.5 15 3.2 2.0-5.3
Women 684 97 14.2 11.8-17.0 16 2.3 1.5-3.8
   Education (years)
Illiterate 220 45 20.5 15.6-26.3 9 4.1 2.2-7.6
1-3 329 47 14.3 10.9-18.5 13 4.0 2.3-6.6
4 479 41 8.5 6.3-11.4 7 1.5 0.7-3.0
5 or more 118 8 6.8 3.5-12.8 2 1.7 0.5-6.0
   Residential status
Living alone 99 20 20.2 13.5-29.2 1 1.0 0.2-5.5
Living with the family 1040 119 11.4 9.7-13.5 30 2.9 2.0-4.1
Institutional residence 7 2 28.6 8.2-64.1 0 0.0 0.0-35.4
   Occupation (present/late)
Farming 421 64 15.2 12.1-18.9 18 4.3 2.7-6.7
Production 239 27 11.3 7.9-15.9 5 2.1 0.9-4.8
Personal care & serving 189 24 12.7 8.7-18.2 3 1.6 0.5-4.6
Sales/White collar 162 9 5.6 3.0-10.2 2 1.2 0.3-4.4
Housewife (not rewarded) 135 17 12.6 8.0-19.2 3 2.2 0.8-6.3
   Retired worker
Yes 781 110 14.1 11.8-16.7 27 3.5 2.4-5.0
No 365 31 8.5 6.1-11.8 4 1.1 0.4-2.8
   Depending on others
Yes 71 20 28.2 19.0-39.5 10 14.1 7.8-24.0
No 1075 121 11.3 9.5-13.3 21 2.0 1.3-3.0
   Physical/Mental comorbidity
   Depression
Yes 130 34 26.2 19.4-34.3 4 3.1 1.2-7.7
No 1016 107 10.5 8.8-12.6 27 2.7 1.8-3.8
   Cerebrovascular disease
Yes 89 22 24.7 16.9-34.6 15 16.9 10.5-26.0
No 1057 119 11.3 9.5-13.3 16 1.5 0.9-2.4
   Other disease
Yes 183 55 30.1 23.9-37.1 13 7.1 4.2-11.8
No 963 86 8.9 7.3-10.9 18 1.9 1.2-2.9
   No vascular risk factors
0 620 57 9.2 7.2-11.7 12 1.9 1.1-3.4
1 363 57 15.7 12.3-19.8 14 3.9 2.3-6.4
2 or more 163 27 16.6 11.6-23.0 5 3.1 1.3-7.0
  1. Prev: prevalence; at least one of: traumatic brain injury, alcohol abuse, psychiatric or other neurological disease; Vascular risk factors include high blood pressure, cardiac disease, diabetes and dyslipidemia