Table 2 Multivariate-adjusted ORs and 95%CI of baseline characteristics for rapidly decreasing group compared with steadily decreasing group of cognitive function

 55–64 years

reference

 65–74 years

2.35 (1.08–5.92)

0.046

 75–79 years

1.74 (0.76–4.54)

0.219

  > =80 years

0.32 (0.10–1.04)

0.053

Female

0.86 (0.54–1.41)

0.545

 Primary school or lower

reference

 Middle or high school

0.23 (0.14–0.38)

< 0.001

 University or higher

0.28 (0.11–0.64)

0.005

 Unemployed

reference

 Worker or farmer

0.76 (0.51–1.15)

0.200

 Professional technician or others

0.64 (0.30–1.27)

0.221

 Married or partnered

reference

 Never married or non-partnered

1.58 (1.01–2.44)

0.042

 Living with others

reference

 Living alone

0.68 (0.34–1.28)

0.246

 Never or former smoking

reference

 Current smoking

1.43 (0.78–2.54)

0.234

 Never or former smoking

reference

 Current drinking

0.56 (0.23–1.21)

0.163

 <= 30 minutes/day

reference

 >  30 minutes/day

1.10 (0.72–1.70)

0.669

  > = 6 hours

reference

  < 6 hours

0.88 (0.56–1.34)

0.552

Overweight or obese

1.04 (0.71–1.55)

0.840

Family history of dementia

0.39 (0.02–2.02)

0.371

Stroke

1.20 (0.69–2.02)

0.506

CHD

0.90 (0.52–1.51)

0.699

Hypertension

1.22 (0.83–1.78)

0.316

Diabetes

1.02 (0.68–1.52)

0.905

Hyperlipidemia

1.27 (0.89–1.83)

0.190

Hyperuricemia

0.97 (0.63–1.47)

0.898

Visual impairment

0.86 (0.54–1.35)

0.503

Hearing impairment

0.88 (0.56–1.37)

0.563

Anemia

0.89 (0.26–2.52)

0.833

Malnourished or at risk of malnutrition

0.97 (0.54–1.67)

0.905

Frailty

1.59 (0.67–3.62)

0.281

MMSE score

0.66 (0.61–0.71)

< 0.001

GDS score

1.02 (0.94–1.10)

0.639

ADL score

0.99 (0.91–1.06)

0.704

IADL score

1.18 (1.12–1.24)

< 0.001

Tinetti total score

1.01 (0.97–1.06)

0.650

RBD score

1.04 (1.01–1.06)

0.002