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Table 1 Characteristics of Chinese adults aged 60+ in the CHARLS 2011 and 2015 (n = 8182)

From: The change and correlates of healthy ageing among Chinese older adults: findings from the China health and retirement longitudinal study

Variables

Total (n = 8182)

2011 (n = 3695)

2015 (n = 4487)

MD

Mean/percentage

Std. Dev.

Mean/percentage

Mean/percentage

Dependent variable

 CHAI

5.42

2.08

5.67

5.20

−0.47***

 SBP (mmHg)

141.50

78.15

143.15

140.02

−3.13***

 Peak expiratory flow (L/min)

254.17

138.81

236.43

269.94

33.51***

 Fasting glucose (mg/dL)

106.66

33.25

110.99

102.81

−8.18***

 TICS score

15.72

5.81

15.54

15.89

0.35***

 eGFR (mL/min per 1.73 m2)

76.05

11.24

76.15

75.96

−0.19***

 hsCRP (mg/L)

3.17

7.53

3.39

2.98

−0.41***

Independent variables

 Age groups

  60–64

0.36

0.48

0.36

0.35

−0.01

  65–69

0.27

0.44

0.25

0.28

0.03***

  70–74

0.19

0.40

0.20

0.19

−0.01

  75–79

0.13

0.33

0.13

0.12

−0.01

   ≥ 80

0.06

0.24

0.06

0.06

0.00

 Sex (1 = male, 0 = female)

0.50

0.50

0.49

0.50

0.01

 Marital status (1 = married, 0 = others)

0.77

0.42

0.76

0.78

0.02**

 Education

1.81

0.98

1.75

1.87

0.12***

  Illiterate

0.51

0.50

0.53

0.49

−0.04***

  Primary school

0.25

0.44

0.26

0.25

−0.01

  Middle school

0.16

0.36

0.14

0.16

0.02***

  High school or higher

0.08

0.28

0.07

0.10

0.03***

 Region

4.78

2.53

4.88

4.69

−0.19***

  North

0.12

0.32

0.11

0.13

0.02***

  East

0.06

0.24

0.07

0.06

−0.01*

  Central

0.20

0.40

0.19

0.20

0.01

  Southwest

0.16

0.37

0.16

0.16

0.00

  Northeast

0.07

0.25

0.07

0.07

0.00

  Northwest

0.07

0.26

0.09

0.06

−0.03***

  South central

0.14

0.35

0.13

0.15

0.02***

  South east

0.07

0.25

0.07

0.07

0.00

  South

0.11

0.31

0.12

0.10

−0.02***

 Current residence (1 = rural, 0 = urban)

0.56

0.50

0.56

0.56

0.00

 Smoking (1 = yes, 0 = no)

0.27

0.45

0.27

0.28

0.01

 Overweight or obese (BMI ≥ 24 kg/m2)

0.42

0.49

0.40

0.44

0.04***

 Chronic disease (1 = yes, 0 = no)

0.75

0.43

0.78

0.73

−0.05***

 Social activity (1 = yes, 0 = no)

0.51

0.50

0.49

0.53

0.04***

  1. CHARLS China Health and Retirement Longitudinal Study, CHAI Chinese Healthy Ageing Index, SBP Systolic blood pressure, TICS Telephone Interview for Cognitive Status, eGFR Estimated glomerular filtration rate, hsCRP High-sensitivity C-reactive protein, MD Mean difference. The significance of the mean difference is based on independent t-tests. * p ≤ 0.1, ** p ≤ 0.05, *** p ≤ 0.01
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BMC Geriatrics

ISSN: 1471-2318

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