Table 2 Demographic characteristic of participants by perceived social support quality

Age (years old)^a

 < 18

680 (6.4)

1.8

33.5

64.7

 < 0.001

271 (5.9)

2.6

33.6

63.8

0.116

409 (6.8)

1.2

33.5

65.3

0.006

18–21

8136 (76.3)

1.7

35.7

62.7

3650 (78.9)

2.1

38.2

59.6

4486 (74.1)

1.3

33.6

65.1

22–25

1640 (15.4)

1.6

30.5

67.9

612 (13.2)

1.8

36.3

61.9

1028 (17.0)

1.5

27.1

71.4

 ≥ 26

203 (1.9)

2.5

25.6

71.9

86 (1.9)

3.5

24.4

72.1

117 (1.9)

1.7

26.5

71.8

0.411

Ethnicity

Han

9476 (88.8)

1.7

34.6

63.7

0.985

4205 (90.9)

2.2

37.1

60.7

0.259

5217 (87.1)

1.3

32.5

66.2

Minority

1200 (11.2)

1.8

34.7

63.6

420 (9.1)

1.7

41.0

57.4

780 (12.9)

1.8

31.3

66.9

Religious belief

No

10,097 (94.6)

1.6

34.3

64.1

0.001

4345 (93.9)

2.2

37.1

60.7

0.155

5752 (95.1)

1.2

32.1

66.6

 < 0.001

Yes

579 (5.4)

2.9

39.7

57.3

280 (6.1)

2.1

42.9

55.0

299 (4.9)

3.7

36.8

59.5

Residence area

Rural

4978 (46.6)

1.9

38.0

60.1

 < 0.001

2326 (50.3)

2.1

35.8

62.0

0.061

3372 (55.7)

1.1

28.7

70.2

 < 0.001

Urban

5698 (53.4)

1.5

31.6

66.8

2299 (49.7)

2.2

39.1

58.7

2679 (44.3)

1.6

37.0

61.4

From a single parent family or not

Yes

817 (7.7)

3.2

41.5

55.3

 < 0.001

317 (6.9)

3.8

41.6

54.6

0.022

500 (8.3)

2.8

42.4

55.8

 < 0.001

No

9859 (92.3)

1.6

34.0

64.4

4308 (93.1)

2.0

37.2

60.8

5551 (91.7)

1.2

31.6

67.2

From a single child family or not

Yes

4931 (46.2)

1.7

31.6

66.7

 < 0.001

2397 (51.8)

2.2

34.0

63.8

 < 0.001

2534 (41.9)

1.2

29.4

69.4

 < 0.001

No

5745 (53.8)

1.7

37.1

61.2

2228 (48.2)

2.2

41.2

56.7

3517 (58.1)

1.4

34.5

64.0

Paternal education level

Elementary school and below

1558 (14.6)

2.2

40.0

57.8

 < 0.001

711 (15.4)

2.8

42.1

55.1

0.002

847 (14.0)

1.7

38.3

60.1

 < 0.001

Junior high school

3872 (36.3)

1.6

37.2

61.2

1745 (37.7)

2.0

38.9

59.1

2127 (35.2)

1.3

35.9

62.8

High/Secondary school

2739 (25.7)

1.6

32.9

65.4

1152 (24.9)

2.2

36.7

61.1

1587 (26.2)

1.3

30.2

68.6

College and above

2507 (23.5)

1.6

29.0

69.5

1017 (22.0)

2.0

32.7

65.3

1490 (24.6)

1.3

26.4

72.3

Maternal education level

Elementary school and below

2742 (25.7)

2.0

39.6

58.4

 < 0.001

1275 (27.6)

2.4

39.4

58.3

 < 0.001

1467 (24.2)

1.6

39.9

58.5

 < 0.001

Junior high school

3711 (34.8)

1.5

36.0

62.5

1646 (35.6)

1.9

38.5

59.7

2065 (34.1)

1.2

34.0

64.8

High/Secondary school

2395 (22.4)

1.5

32.2

66.3

983 (21.3)

2.4

39.3

58.3

1412 (23.3)

0.9

27.2

71.9

College and above

1828 (17.1)

1.9

27.4

70.8

721 (15.6)

2.1

29.4

68.5

1107 (18.3)

1.7

26.0

72.3

Household economic status

Poor

3358 (31.5)

2.5

41.6

55.9

 < 0.001

1624 (35.1)

3.0

42.6

54.4

 < 0.001

1734 (28.7)

2.0

40.7

57.4

 < 0.001

General

6373 (59.7)

1.3

32.9

65.8

2627 (56.8)

1.6

36.0

62.4

3746 (61.9)

1.0

30.8

68.2

Good

945 (8.9)

1.7

21.0

77.4

374 (8.1)

2.1

25.7

72.2

571 (9.4)

1.4

17.9

80.7

Total

10,676 (100.0)

181 (1.7)

3692 (34.6)

6803 (63.7)

4625 (100.0)

100 (2.2)

1733 (37.5)

2792 (60.4)

6051 (100.0)

81 (1.3)

1959 (32.4)

4011 (66.3)