Table 1 Socio-demographic characteristics of the participants

Sex

3.2

1

0.075

0.4

1

0.52

 Male

467

(51.1)

381

(46.8)

302

(51.9)

165

(49.7)

 Female

447

(48.9)

433

(53.2)

280

(48.1)

167

(50.3)

Age (mean, SD)*

29.8

(9.1)

35.8

(10.0)

13.2

1655

<0.001

Age group

114.0

1

<0.001

  < = 32 years (“new generation”)

582

(63.7)

309

(38.0)

  > 32 years

332

(36.3)

505

(62.0)

Education

216.1

2

<0.001

69.6

2

<0.001

 Junior high school or below

469

(51.3)

163

(20.0)

240

(41.2)

229

(69.0)

 Senior high school

341

(37.3)

386

(47.4)

253

(43.5)

88

(26.5)

 College or above

104

(11.4)

265

(32.6)

89

(15.3)

15

(4.5)

Marital status

58.2

2

<0.001

344.2

2

<0.001

 Single

421

(46.1)

230

(28.3)

402

(69.1)

19

(5.7)

 Married / cohabited

476

(52.1)

565

(69.4)

177

(30.4)

299

(90.1)

 Other

17

(1.9)

19

(2.3)

3

(0.5)

14

(4.2)

Job

0.2

1

0.68

61.5

1

<0.001

 Manufacturing

446

(48.8)

389

(47.8)

227

(39.0)

219

(66.0)

 Non-manufacturing

468

(51.2)

425

(52.2)

355

(61.0)

113

(34.0)

Working hours per day

43.1

2

<0.001

3.5

2

0.18

  < = 8

550

(60.2)

607

(74.6)

337

(57.9)

213

(64.2)

 9-11

298

(32.6)

181

(22.2)

200

(34.4)

98

(29.5)

  > = 12

66

(7.2)

26

(3.2)

45

(7.7)

21

(6.3)

Working days per week

47.9

2

<0.001

5.3

2

0.07

  < = 5

155

(17.0)

210

(25.8)

98

(16.8)

57

(17.2)

 6

498

(54.5)

475

(58.4)

332

(57.0)

166

(50.0)

 7

261

(28.6)

129

(15.8)

152

(26.1)

109

(32.8)

Monthly income (RMB)

4.7

3

0.19

14.8

3

0.002

  < 1000

52

(5.7)

41

(5.0)

23

(4.0)

29

(8.7)

 1000-3000

706

(77.2)

624

(76.7)

447

(76.8)

259

(78.0)

 3000-5000

128

(14.0)

108

(13.3)

95

(16.3)

33

(9.9)

  > = 5000

28

(3.1)

41

(5.0)

17

(2.9)

11

(3.3)

Income satisfaction

56.8

4

<0.001

9.3

4

0.055

 Very satisfied

18

(2.0)

14

(1.7)

8

(1.4)

10

(3.0)

 Satisfied

125

(13.7)

95

(11.7)

69

(11.9)

56

(16.9)

 Average

566

(61.9)

396

(48.6)

373

(64.1)

193

(58.1)

 Unsatisfied

176

(19.3)

236

(29.0)

116

(19.9)

60

(18.1)

 Very unsatisfied

29

(3.2)

73

(9.0)

16

(2.7)

13

(3.9)

Insurance coverage**

100.4

1

<0.001

8.3

1

0.004

 Yes

688

(75.3)

758

(93.1)

420

(72.2)

268

(80.7)

 None

226

(24.7)

56

(6.9)

162

(27.8)

64

(19.3)

SSRS use of support score (mean, SD)*

7.7

(2.0)

8.0

(1.9)

3.2

1726

0.001

7.8

(1.9)

7.5

(2.0)

2.0

912

0.04

Household registration (hukou)

0.0

1

0.94

 Urban

90

(15.5)

52

(15.7)

 Rural

492

(84.5)

280

(84.3)

Length of stay in Guangzhou

20.3

1

<0.001

 1 year or more

418

(71.8)

282

(84.9)

 Less than 1 year

164

(28.2)

50

(15.1)

Reasons of moving to Guangzhou

 Wanted to earn more money

301

(51.7)

276

(83.1)

89.6

1

<0.001

 Wanted to learn skills

299

(51.4)

94

(28.3)

45.9

1

<0.001

 Wanted to live in cities

57

(9.8)

21

(6.3)

3.3

1

0.07

 Forced by family

32

(5.5)

34

(10.2)

7.1

1

0.008