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Table 1 General characteristics of students with and without metabolic syndrome before and after matching

From: Association of sleep duration with metabolic syndrome and its components in children and adolescents; a propensity score-matched analysis: the CASPIAN-V study

Variables

Before propensity score-matched

After propensity score-matched

Without MetS (n = 3544)

With MetS (n = 188)

P-value

Without MetS (n = 151)

With MetS (n = 151)

P-value*

N (%)

N (%)

N (%)

N (%)

Age (years)

 Mean (SD)

12.44 (3.05)

12.41 (2.89)

0.88

12.26 (2.99)

12.38 (2.97)

0.74

Sex

 Boy

1855 (52.4)

108 (57.4)

0.17

85 (56.29)

90 (59.60)

0.56

 Girl

1688 (47.6)

80 (42.6)

 

66 (43.71)

61 (40.40)

 

Living area

 Urban

2560 (72.2)

154 (81.9)

0

123 (81.46)

123 (81.46)

1

 Rural

984 (27.8)

34 (18.1)

 

28 (18.54)

28 (18.54)

 

Physical activity

 Low

1116 (33.6)

60 (33.7)

0.08

59 (39.07)

51 (33.77)

0.15

 Moderate

1091 (32.8)

71 (39.9)

 

44 (29.14)

60 (39.74)

 

 High

1116 (33.6)

47 (26.4)

 

48 (31.79)

40 (26.49)

 

SES

 Low

1143 (33.8)

66 (36.7)

0.68

60 (39.74)

57 (37.75)

0.68

 Moderate

1122 (33.1)

59 (32.8)

 

44 (29.14)

51 (33.77)

 

 High

1121 (33.1)

55 (30.6)

 

47 (31.13)

43 (28.48)

 

Watching TV

 Low

1665 (47)

79 (42)

0.18

69 (45.70)

66 (43.71)

0.73

 High

1875 (53)

109 (58)

 

82 (54.30)

85 (56.29)

 

Working with computer

 Low

3161 (91.4)

172 (93)

0.46

138 (91.39)

140 (92.72)

0.67

 High

297 (8.6)

13 (7)

 

13 (8.61)

11 (7.28)

 

Parental BMI

 Mean (SD)

26.32 (4.85)

27.05 (4.99)

0.05

27.09 (4.95)

27.19 (4.88)

0.86*

Sweets

 Daily

720 (20.3)

42 (22.3)

0.19

40 (26.49)

35 (23.18)

0.78

 Weekly

1531 (43.2)

91 (48.4)

 

66 (43.71)

75 (49.67)

 

 Rarely

1195 (33.7)

49 (26.1)

 

43 (28.48)

39 (25.83)

 

 Never

98 (2.8)

6 (3.2)

 

2 (1.32)

2 (1.32)

 

Salty snacks

 Daily

162 (4.6)

19 (10.1)

0.01

11 (7.28)

13 (8.61)

0.8

 Weekly

1000 (28.3)

54 (28.7)

 

47 (31.13)

43 (28.48)

 

 Rarely

1819 (51.5)

89 (47.3)

 

72 (47.68)

78 (51.66)

 

 Never

550 (15.6)

26 (13.8)

 

21 (13.91)

17 (11.26)

 

Soft drinks

 Daily

109 (3.1)

8 (4.3)

0.01

7 (4.64)

6 (3.97)

0.91

 Weekly

927 (26.2)

68 (36.2)

 

50 (33.11)

46 (30.46)

 

 Rarely

1611 (45.5)

73 (38.8)

 

59 (39.07)

65 (43.05)

 

 Never

897 (25.3)

39 (20.7)

 

35 (23.18)

34 (22.52)

 

Diet coke

 Daily

20 (0.6)

1 (0.5)

0.76

0

1 (0.66)

0.58

 Weekly

151 (4.3)

10 (5.4)

 

7 (4.64)

9 (5.96)

 

 Rarely

643 (18.2)

38 (20.4)

 

25 (16.56)

28 (18.54)

 

 Never

2710 (76.9)

137 (73.7)

 

119 (78.81)

113 (74.83)

 

Canned fruit juice

 Daily

363 (10.4)

23 (12.4)

0.8

24 (15.89)

22 (14.57)

0.97

 Weekly

1156 (33.1)

57 (30.8)

 

53 (35.1)

53 (35.10)

 

 Rarely

1501 (42.9)

79 (42.7)

 

62 (41.06)

62 (41.06)

 

 Never

476 (13.6)

26 (14.1)

 

12 (7.95)

14 (9.27)

 

Fast foods

 Daily

418 (11.8)

28 (15)

0.35

17 (11.26)

19 (12.58)

0.98

 Weekly

532 (15)

32 (17.1)

 

26 (17.22)

26 (17.22)

 

 Rarely

1898 (53.6)

97 (51.9)

 

82 (54.30)

82 (54.30)

 

 Never

696 (19.6)

30 (16)

 

26 (17.22)

24 (15.89)

 

Coffee

 Daily

187 (5.3)

18 (9.6)

0.05

8 (5.30)

10 (6.62)

0.59

 Weekly

394 (11.1)

24 (12.8)

 

22 (14.57)

19 (12.58)

 

 Rarely

1386 (39.1)

73 (38.8)

 

55 (36.42)

65 (43.05)

 

 Never

1575 (44.5)

73 (38.8)

 

66 (43.71)

57 (37.75)

 

Family history of hyperlipidemia

 No

1719 (49.1)

92 (49.5)

0.92

77 (50.99)

77 (50.99)

1

 Yes

1783 (50.9)

94 (50.5)

 

74 (49.01)

74 (49.01)

 

Family history of diabetes

 No

1641 (46.6)

77 (41)

0.13

51 (33.77)

60 (39.74)

0.28

 Yes

1877 (53.4)

111 (59)

 

100 (66.23)

91 (60.26)

 

Family history of obesity

 No

1817 (51.5)

91 (48.4)

0.4

72 (47.68)

71 (47.02)

0.91

 Yes

1708 (48.5)

97 (51.6)

 

79 (52.32)

80 (52.98)

 
  1. BMI body mass index, SES socioeconomic status, MetS metabolic syndrome
  2. * P-vale for age according to the T-test, others are based on Chi square test