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Table 2 Generalized linear model using GEE with cognitive function in 2006–2016

From: Association between change in lifestyle and cognitive functions among elderly Koreans: findings from the Korean longitudinal study of aging (2006–2016)

Variablesb

K-MMSEa

Male

Female

β

SD

P-value

β

SD

P-value

Change of lifestyle

 Good→Good

0.509

3.245

0.0077

0.813

4.654

0.0005*

 Bad→Good

0.274

3.522

0.2700

0.914

3.744

<.0001*

 Good→Bad

0.043

4.524

0.8898

0.475

4.542

0.0481

 Bad→Bad

ref.

  

ref.

  

Age

 65–69

0.933

5.236

0.0005*

1.652

6.579

<.0001*

 70–74

0.610

7.726

0.0043

1.419

9.034

<.0001*

 75–79

0.469

6.446

0.0079

0.865

7.249

<.0001*

 80-

ref.

  

ref.

  

Economic activity

 Active

0.675

4.487

<.0001

0.558

4.618

0.0138

 Nonactive

ref.

  

ref.

  

Region

 Urban area

0.223

6.453

0.1539

0.347

7.716

0.0696

 Rural area

ref.

  

ref.

  

Marital status

 Married

0.295

13.257

0.1803

−0.023

7.737

0.9059

 Single, widow, divorced, separated

ref.

  

ref.

  

Living arrangement

 Three generation family or more

−0.654

5.702

0.0292

−0.778

7.224

0.0150

 Two-generation family

0.070

5.429

0.7221

−0.297

6.242

0.2114

 One-generation family

ref.

  

ref.

  

Educational level

 Middle school or above

0.787

7.838

<.0001

0.859

6.688

0.0003

 Elementary school or below

ref.

  

ref.

  

Household income

 Quartile 4 (high)

0.341

6.706

0.1086

0.680

7.459

0.0075

 Quartile 3

0.211

6.497

0.2916

0.325

6.000

0.1490

 Quartile 2

0.275

6.529

0.1642

0.330

5.591

0.1024

 Quartile 1 (low)

ref.

  

ref.

  

Participation in social activities

 2 or more

1.216

4.917

<.0001*

1.252

5.152

<.0001*

 1

1.026

7.633

<.0001*

1.140

7.983

<.0001*

 0

ref.

  

ref.

  

Chronic disease

 3 or more

−0.531

6.635

0.0267

−0.170

8.136

0.5795

 2

−0.140

5.869

0.4521

0.341

7.740

0.1700

 1

−0.022

5.650

0.8936

0.431

7.891

0.0712

 0

ref.

  

ref.

  

Depression

 No

ref.

  

ref.

  

 Yes

−1.033

5.503

<.0001

−0.842

6.887

<.0001

Disability status

 Disabled

−2.126

6.668

<.0001

−2.488

6.953

<.0001

 Nondisabled

ref.

  

ref.

  

Lagged dependent variable

 MMSE score of previous survey

0.376

0.788

<.0001

0.336

0.701

<.0001

Year

 2008

−0.015

7.331

0.9475

−0.463

8.137

0.1068

 2010

0.143

6.674

0.5246

−0.116

7.190

0.6693

 2012

0.365

6.073

0.0883

0.366

5.967

0.1135

 2014

−0.122

5.807

0.5737

−0.539

6.006

0.0242

 2016

ref.

  

ref.

  
  1. *Significant P-value after Bonferroni correction
  2. aCognitive function was measured using the K-MMSE
  3. bAge, economic status, region, marital status, living arrangement, educational level, household income, participation in social activities, chronic disease, depressive symptoms, disability status, and survey year were adjusted
  4. GEE Generalized estimating equation, K-MMSE Korean Mini-Mental State Examination (score of 0–30), SD Standard deviation