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Table 1 Baseline characteristics of the study group

From: Obese people benefit from lumbar spinal stenosis surgery as much as people of normal weight

 

Normal weight

< 25

N = 106

Overweight

25.0–29.9

N = 154

Obese

≥30

N = 99

P value

BMI, mean (SD)

22.7 (1.9)

27.5 (1.4)

33.8 (3.2)

..

Female, n (%)

63 (59)

78 (51)

55 (56)

0.37

Age, mean (SD)

70 (12)

70 (10)

67 (13)

0.063

Diagnosis, n (%)

   

0.31

 Central spinal stenosis without olisthesis (≤ 3 mm)

58 (55)

95 (62)

63 (64)

 

 Central spinal stenosis with olisthesis (> 3 mm)

36 (34)

38 (25)

21 (21)

 

 Lateral stenosis

12 (11)

21 (14)

15 (15)

 

Duration of back pain, n (%)

   

0.86

 No pain

5 (5)

5 (3)

2 (2)

 

 Less than 3 months

7 (7)

10 (7)

4 (4)

 

 3–12 months

27 (26)

35 (24)

28 (29)

 

 1–2 years

17 (16)

22 (15)

17 (17)

 

 Over 2 years

49 (47)

72 (50)

47 (48)

 

Duration of leg pain, n (%)

   

0.71

 No pain

3 (3)

4 (3)

3 (3)

 

 Less than 3 months

9 (8)

10 (7)

7 (7)

 

 3–12 months

32 (30)

47 (31)

28 (29)

 

 1–2 years

26 (25)

32 (21)

19 (19)

 

 Over 2 years

36 (34)

59 (39)

41 (42)

 

Smoker, n (%)

12 (11)

19 (13)

8 (8)

0.56

VAS, mean (SD)

    

 Back

52 (28)

55 (26)

57 (28)

0.49

 Leg

56 (26)

61 (25)

60 (25)

0.28

Regular pain medication, n (%)

56 (53)

80 (52)

55 (56)

0.85

Walking distance < 0.5 km

62 (58)

96 (62)

82 (83)

0.007