Table 1 Baseline characteristics with total samples(‾x±s)

Gender

Male

191(31.26)

72.3 ± 28.98

62.15 ± 44.1

82.9 ± 20.53

61.45 ± 19.05

74.96 ± 26.76

82.86 ± 23.78

64.41 ± 42.54

68.98 ± 19.79

278.79 ± 83.45

291.2 ± 80.34

569.99 ± 150.41

2.801

0.005

Female

420(68.73)

82.7 ± 21.08

70.83 ± 40.51

82.71 ± 20.94

63.7 ± 20.15

76.16 ± 17.64

86 ± 22.45

69.21 ± 41.31

74.28 ± 24.54

299.95 ± 76.58

305.65 ± 76.17

605.6 ± 143.44

Age (yr)

60–64

327(53.52)

84.76 ± 18.47

74.03 ± 38.96

84.56 ± 19.68

64.03 ± 20.17

76.81 ± 17.02

87.84 ± 21.2

69.69 ± 40.95

73.6 ± 21.84

307.37 ± 73.72

307.93 ± 72.52

615.3 ± 136.23

7.826

< 0.001

65–69

179(29.30)

77.57 ± 26.71

65.68 ± 43.11

82.16 ± 19.43

62.86 ± 20.62

75.03 ± 27.2

84.78 ± 22.37

70.26 ± 41.21

69.77 ± 19.01

288.27 ± 80.56

299.84 ± 79.45

588.12 ± 146.59

> 70

105(17.18)

71.07 ± 28.12

56.30 ± 44.44

79.37 ± 24.97

60.93 ± 18.32

74.32 ± 19.39

79.57 ± 25.97

56.83 ± 44.07

74.7 ± 30.55

267.67 ± 85.67

285.43 ± 86.36

553.10 ± 163.64

Educational levels

Elementary school and below

14(2.29)

79.82 ± 21.61

70.23 ± 40.28

80.95 ± 20.29

58.45 ± 20.34

72.89 ± 17.68

81.31 ± 20.7

64.27 ± 41.56

71.62 ± 31.43

289.44 ± 74.09

290.09 ± 78.02

579.53 ± 142.99

0.801

0.494

High school

284(46.48)

80.3 ± 21.04

66.09 ± 41.97

81.24 ± 22.95

64.31 ± 19.45

75.49 ± 17.67

83.47 ± 25.1

65.8 ± 43.12

74.12 ± 23.05

291.93 ± 79.5

298.88 ± 76.93

590.81 ± 147.9

Junior college

195(31.91)

79.87 ± 25.8

67.93 ± 43.35

83.51 ± 19.28

62.57 ± 20.04

76.08 ± 18.95

85.89 ± 22.18

68.73 ± 40.98

71.97 ± 19.98

293.88 ± 82.67

302.67 ± 78.82

596.55 ± 152.02

Undergraduate degree and above

118(19.31)

77.63 ± 28.69

71.05 ± 39.99

85.87 ± 20.26

66.24 ± 18.93

78.8 ± 29.79

90.41 ± 20.87

71.93 ± 41.02

72.73 ± 19.53

300.8 ± 78.09

313.86 ± 75.87

614.66 ± 136.84

Marital status

Single

16(2.62)

73.33 ± 34.68

68.33 ± 40.61

85.6 ± 15.44

66.34 ± 18.56

72.67 ± 15.45

90 ± 26.39

75.56 ± 38.76

72.78 ± 16.88

293.6 ± 83.08

311.00 ± 84.09

604.60 ± 160.12

3.531

0.015

First married

529(86.58)

80.45 ± 23.34

68.89 ± 41.65

83.12 ± 20.40

62.98 ± 20.26

76.28 ± 21.32

85.58 ± 22.77

68.69 ± 41.49

72.18 ± 18.54

295.45 ± 79.17

302.74 ± 76.57

598.18 ± 145.09

Divorced

36(5.89)

67.78 ± 28.84

58.33 ± 41.46

74.67 ± 27.15

58.56 ± 11.23

68.33 ± 11.99

80.51 ± 25.07

48.48 ± 41.38

61.11 ± 15.02

259.34 ± 77.89

258.43 ± 60.45

517.77 ± 123.70

Remarried

30(4.91)

78.10 ± 23.58

65.44 ± 43.53

77.77 ± 25.57

64.21 ± 17.45

76.09 ± 18.94

76.78 ± 25.19

64.71 ± 42.59

78.46 ± 51.92

285.52 ± 79.77

296.03 ± 96.06

581.55 ± 166.16

The situation of revenue and expenditure

Income surplus

362(59.24)

79.55 ± 24.23

69.98 ± 40.51

85.56 ± 19.36

63.33 ± 18.84

78.64 ± 24.06

89.09 ± 21.43

69.12 ± 41.34

73.38 ± 17.80

298.42 ± 76.92

310.22 ± 73.25

608.64 ± 137.49

18.220

< 0.001

Balance of payments

29(4.75)

80 ± 22.66

65.61 ± 42.48

81.68 ± 21.41

63.22 ± 20.47

74.44 ± 18.28

84.07 ± 23.42

66.25 ± 42.04

71.33 ± 18.46

290.50 ± 79.18

296.09 ± 77.72

586.60 ± 147.62

Expenditure exceeds income

220(36.01)

64.66 ± 36.13

61.21 ± 45.6

76.14 ± 24.25

56.59 ± 19.32

70.07 ± 20.06

75.35 ± 23.22

63.22 ± 43.96

65.55 ± 20.41

258.59 ± 93.43

274.18 ± 79.28

532.78 ± 161.68

Medical expenses

Free medical service

33(5.41)

78.29 ± 24.08

65.85 ± 42.93

84.66 ± 18.8

65.4 ± 19.23

76.52 ± 17.34

85.65 ± 21.55

66.18 ± 42.33

72.76 ± 27.29

294.21 ± 78.52

301.11 ± 78.09

595.32 ± 146.69

7.820

< 0.001

Medical insurance

398(65.14)

80.51 ± 23.74

68.89 ± 41.09

81.69 ± 22.1

61.69 ± 19.82

75.59 ± 23.19

85.36 ± 23.62

68.75 ± 41.15

72.98 ± 17.74

292.78 ± 80.96

302.68 ± 78.48

595.46 ± 148.13

Self-financed medical service

180(29.46)

60 ± 38.51

75 ± 50

81.5 ± 27.39

46.5 ± 9.54

73.75 ± 13.15

96.76 ± 12.09

41.67 ± 50

68.75 ± 14.63

263 ± 72.5

280.93 ± 71.85

543.93 ± 143.79