Table 2 CQ-11D index scores and demographic characteristics of all respondents

Total

7498(100.00)

0.897(0.142)

0.870 ∼ 0.983

-

Sex

< 0.001

Male

3437(45.84)

0.910(0.131)

0.891 ∼ 0.989

Female

4061(54.16)

0.886(0.150)

0.863 ∼ 0.976

Age

< 0.001

15∼24 years

1910(25.47)

0.921(0.107)

0.902 ∼ 0.989

25∼34 years

1120(14.94)

0.921(0.118)

0.909 ∼ 0.994

35∼44 years

1117(14.90)

0.915(0.111)

0.893 ∼ 0.987

45∼54 years

1507(20.10)

0.899(0.123)

0.873 ∼ 0.978

55∼64 years

866(11.55)

0.879(0.155)

0.857 ∼ 0.972

65∼74 years

525(7.00)

0.835(0.194)

0.784 ∼ 0.957

75 + years

453(6.04)

0.796(0.248)

0.731 ∼ 0.964

Geographical division

< 0.001

North China

939(12.52)

0.894(0.121)

0.861 ∼ 0.967

Central China

1129(15.06)

0.884(0.148)

0.848 ∼ 0.983

East China

1915(25.54)

0.899(0.152)

0.878 ∼ 0.983

South China

893(11.91)

0.898(0.142)

0.868 ∼ 0.994

Northeast China

728(9.71)

0.904(0.146)

0.883 ∼ 0.989

Northwest China

769(10.26)

0.897(0.133)

0.869 ∼ 0.976

Southwest China

1125(15.00)

0.905(0.137)

0.884 ∼ 0.987

Ethnicity

0.772

Han nationality

6735(89.82)

0.899(0.139)

0.874 ∼ 0.983

Ethnic minorities

763(10.18)

0.881(0.167)

0.841 ∼ 0.994

Marital status

< 0.001

Unmarried

2567(34.23)

0.918(0.115)

0.897 ∼ 0.993

Married

4674(62.34)

0.891(0.146)

0.867 ∼ 0.978

Divorced/widowed

246(3.28)

0.797(0.243)

0.716 ∼ 0.961

Others

11(0.15)

0.881(0.108)

0.816 ∼ 0.958

Occupation

< 0.001

Employed

3758(50.12)

0.909(0.121)

0.882 ∼ 0.983

Retirement

910(12.14)

0.853(0.176)

0.814 ∼ 0.961

Student

1989(26.53)

0.915(0.123)

0.898 ∼ 0.989

Unemployed

643(8.57)

0.832(0.216)

0.781 ∼ 0.967

Others

198(2.64)

0.917(0.109)

0.902 ∼ 0.989

Household registration

0.8724

Non-rural

4274(57)

0.904(0.125)

0.875 ∼ 0.982

Rural

3224(43)

0.888(0.162)

0.867 ∼ 0.989

Education level

< 0.001

Primary school and below

752(10.03)

0.825(0.210)

0.770 ∼ 0.964

Middle school

1249(16.66)

0.892(0.150)

0.869 ∼ 0.983

High school/Junior college

1832(24.43)

0.899(0.139)

0.874 ∼ 0.989

University

3235(43.15)

0.915(0.114)

0.891 ∼ 0.987

Master’s degree and above

430(5.73)

0.899(0.133)

0.870 ∼ 0.978

Income/month, RMB

0.061

0 ∼ 1300

1636(21.82)

0.883(0.168)

0.858 ∼ 0.987

1300–3300

2264(30.20)

0.901(0.133)

0.873 ∼ 0.983

3300–6300

2090(27.87)

0.901(0.132)

0.875 ∼ 0.982

6300–13,000

1061(14.15)

0.907(0.127)

0.881 ∼ 0.987

13,000–21,000

219(2.92)

0.893(0.131)

0.867 ∼ 0.971

21,000–42,000

84(1.12)

0.898(0.143)

0.874 ∼ 1.000

42,000 and above

144(1.92)

0.887(0.190)

0.867 ∼ 0.997

Smoking

0.004

Never smoked

5592(74.58)

0.904(0.130)

0.875 ∼ 0.983

Occasional smoker

596(7.95)

0.880(0.163)

0.846 ∼ 0.982

Frequent smoker

1020(13.60)

0.878(0.174)

0.863 ∼ 0.983

Former smoker

290(3.87)

0.875(0.182)

0.864 ∼ 0.978

Drinking

< 0.001

Never drink

4032(53.77)

0.901(0.140)

0.876 ∼ 0.989

Occasional drinker

2550(34.01)

0.908(0.120)

0.878 ∼ 0.982

Frequent drinker

566(7.55)

0.842(0.204)

0.790 ∼ 0.967

Former drinker

350(4.67)

0.866(0.167)

0.835 ∼ 0.967

Participation in physical activities

< 0.001

Frequent participation

2621(34.96)

0.913(0.128)

0.897 ∼ 0.994

Occasional participation

2958(39.45)

0.906(0.123)

0.878 ∼ 0.978

Never participate

1669(22.26)

0.861(0.179)

0.818 ∼ 0.972

Uncertain

250(3.33)

0.878(0.165)

0.837 ∼ 0.987

Changes in self-perceived health status compared to the previous year

< 0.001

No change

3222(42.97)

0.930(0.097)

0.918 ∼ 0.993

Improved

1865(24.87)

0.913(0.130)

0.895 ∼ 0.994

Worsened

1351(18.02)

0.811(0.201)

0.748 ∼ 0.942

Uncertain

1060(14.14)

0.882(0.139)

0.857 ∼ 0.965

Presence of chronic diseases

< 0.001

No

4520(60.28)

0.933(0.090)

0.918 ∼ 0.994

Yes

2978(39.72)

0.843(0.184)

0.801 ∼ 0.960

Category of chronic diseases^a

-

-Cardiovascular disease^b

238(3.17)

0.772(0.227)

0.688 ∼ 0.931

-Hypertension

783(10.44)

0.825(0.205)

0.775 ∼ 0.953

-Stroke or other cerebrovascular diseases

71(0.95)

0.725(0.265)

0.574 ∼ 0.924

-Diabetes

236(3.15)

0.814(0.197)

0.731 ∼ 0.958

-Chronic respiratory disease^c

137(1.83)

0.819(0.200)

0.727 ∼ 0.947

-Arthritis^d

483(6.44)

0.803(0.211)

0.742 ∼ 0.931

-Osteoporosis or primary osteoporosis

105(1.40)

0.750(0.265)

0.665 ∼ 0.929

-Cancer or malignant tumor

67(0.89)

0.750(0.259)

0.608 ∼ 0.965

-Other chronic diseases

1379(18.39)

0.864(0.162)

0.828 ∼ 0.964

Number of chronic diseases

0.003

1

2584(34.46)

0.858(0.168)

0.821 ∼ 0.961

2

292(3.89)

0.764(0.235)

0.681 ∼ 0.925

3

80(1.07)

0.728(0.240)

0.650 ∼ 0.905

4

20(0.27)

0.612(0.319)

0.469 ∼ 0.861