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Table 1 Baseline characteristics of study participants by sex (n = 258,367)

From: Association between serum lipids and low back pain among a middle-aged Japanese population: a large-scale cross-sectional study

 

Men (n = 169,606)

Women (n = 88,761)

p valuea

n

%

n

%

Age (years)

 40–49

80,774

47.6

40,029

45.1

<  0.001

 50–59

61,948

36.5

34,912

39.3

 

 60–64

26,884

15.9

13,820

15.6

 

Height (cm)

169.1 (6.4)

157.2 (6.3)

<  0.001

Weight (kg)

68.5 (11.6)

55.7 (10.3)

<  0.001

Body mass index (kg/m2)

 <  18.5

3783

2.2

6241

7.0

<  0.001

 18.5–24.9

110,236

65.0

63,475

71.5

 

 ≥ 25

55,587

32.8

19,045

21.5

 

Physical activity (min/day)

 ≥ 60

58,183

34.3

27,453

30.9

<  0.001

 <  60

111,423

65.7

61,308

69.1

 

Smoking status

 None

58,054

34.2

65,547

73.8

<  0.001

 Former

31,525

18.6

5884

6.6

 

 Current

80,027

47.2

17,330

19.5

 

Alcohol intake

 None

48,457

28.6

50,406

56.8

<  0.001

 Sometimes

48,965

28.9

24,558

27.7

 

 Everyday

72,184

42.6

13,797

15.5

 

Low back pain

 +

3726

2.2

1889

2.1

0.256

 –

165,880

97.8

86,872

97.9

 

LDL-C (mg/dL)

 Normal (<  140)

119,824

70.6

63,407

71.4

<  0.001

 High (≥ 140)

49,782

29.4

25,354

28.6

 

HDL-C (mg/dL)

 Normal (≥ 40)

154,412

91.0

86,920

97.9

<  0.001

 Low (<  40)

15,194

9.0

1841

2.1

 

LDL-C/HDL-C ratio

 Low (<  2.5)

105,067

61.9

70,748

79.7

<  0.001

 High (≥ 2.5)

64,539

38.1

18,013

20.3

 
  1. Data are presented as number and percentage, or mean (standard deviation)
  2. LDL-C: Low-density lipoprotein-cholesterol, HDL-C: High-density lipoprotein-cholesterol
  3. a Pearson chi-square test or unpaired t test
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Lipids in Health and Disease

ISSN: 1476-511X