Table 1 Sample demographic and disease-related information (n = 600)

Gender

0.078

0.780

Male

493

82.17

400

82.82

Female

107

17.83

83

17.18

Age

0.018

0.991

\( \le \)60

308

51.68

246

50.93

61 ~ 70

206

34.56

167

34.58

> 70

86

14.33

70

14.49

Marriage

0.379

0.945

Single

28

4.67

25

5.18

Married/cohabitation

427

71.17

338

69.98

Separated/divorced

108

18.00

87

18.01

Widowed

37

6.17

33

6.83

Education

1.200

0.753

Primary school or below

254

42.33

191

39.54

Middle school

205

34.17

169

34.99

High school

100

16.67

84

17.39

Associate degree or above

41

6.83

39

8.07

Residence

0.724

0.395

Urban

243

40.50

208

43.06

Rural

357

59.50

275

56.94

Employment status

1.601

0.449

Employed

248

41.3

196

40.58

Retired

269

44.8

231

47.83

Farmer

83

13.8

56

11.69

Household monthly income per capita (Yuan)

1.014

0.602

< 600

52

8.67

34

7.04

600 ~ 6000

429

71.50

349

72.26

\( \ge \)6000

119

19.83

100

20.70

City

Hangzhou

245

40.83

234

48.45

7.199

0.027

Huzhou

198

33.00

129

26.71

Quzhou

157

26.17

120

24.84

Comorbidity

0.007

0.935

Without

420

70.00

337

69.77

With

180

30.00

146

30.23

Mode of HIV acquisition

2.254

0.324

Homosexual sex contact

161

26.80

146

30.29

Heterosexual sex contact

418

69.70

324

67.22

Unknown or other

21

3.50

12

2.49

HIV serostatus

0.352

0.838

HIV positive-asymptomatic

345

57.50

282

58.39

HIV positive-symptomatic

114

19.00

85

17.60

AIDS

141

23.50

116

24.02

Baseline CD4⁺T cell count (cell/\( \varvec{\upmu }\mathbf{l}\))

0.258

0.968

< 200

109

18.20

83

17.18

200 ~ 350

179

29.80

142

29.40

351 ~ 500

159

26.50

132

27.33

> 500

151

25.20

124

25.67

Baseline plasma HIV-1 RNA level (copies/ml)

0.254

0.614

< 20

214

87.00

193

88.53

≥ 20

32

13.00

25

11.47