Table 1 Sample description

Age

[60,96]

69.2712 (7.0622)

69.5268 (7.3423)

69.6814 (7.0001)

68.6140 (6.4907)

0.002^**

Gender

1 male

0.4989 (0.5001)

0.2302 (0.4211)

0.8535 (0.3540)

0.8520 (0.3553)

0.000^***

0 female

Residence

1 city

0.2184 (0.4132)

0.2456 (0.4306)

0.2698 (0.4444)

0.1450 (0.3523)

0.000^***

0 rural

Marriage

1 married

0.6527 (0.4762)

0.5875 (0.4924)

0.7581 (0.4287)

0.7300 (0.4442)

0.000^***

0 others

Years of education

2 more than 6 years

1.0359 (0.8844)

0.8767 (0.8948)

1.3093 (0.8019)

1.2180 (0.8338)

0.000^***

1 1–6 years

0 never be educated

Whether had a job before 60 years old

1 had a job

0.1915 (0.3935)

0.1834 (0.3871)

0.2465 (0.4315)

0.1830 (0.3869)

0.008^**

0 others

Self-evaluation economic level

1 middle, more than middle and very high

0.5310 (0.4991)

0.5433 (0.4983)

0.5349 (0.4994)

0.5060 (0.5002)

0.159

0 lower and poor

Whether have regular exercises

1 yes

0.3781 (0.4850)

0.3828 (0.4862)

0.3605 (0.4807)

0.3770 (0.4849)

0.688

0 no

Whether often drink

2 has not been drinking

1.4400 (0.8458)

1.7326 (0.6418)

1.0930 (0.8906)

1.0390 (0.9383)

0.000^***

1 used to drinking but not now

0 has been drinking

Whether have been diagnosed with memory-related disease(yes coded as 1 and no coded as 0)

1 yes

0.0233 (0.1478)

0.0202 (0.1407)

0.0326 (0.1777)

0.0220 (0.1468)

0.293

0 no

Self-evaluation memory

1 excellent, very good, good

0.1444 (0.3515)

0.1478 (0.3550)

0.1512 (0.3586)

0.1350 (0.3419)

0.592

0 general, not good

Daily living abilities

1 good

0.5630 (0.4961)

0.5529 (0.4973)

0.5372 (0.4992)

0.5930 (0.4915)

0.061^.

0 general, not good

Cognitive function

1 good

0.3328 (0.4713)

0.3721 (0.4835)

0.2651 (0.4419)

0.2880 (0.4531)

0.000^***

0 disabled

Sample size

—

3311

1881

430

1000

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