Table 2

Outcome Measures for Male and Female Subjects with and without Low Back Pain

Males

Females

Outcomes

No-LBP

(n = 24)

LBP

(n = 38)

No-LBP

(n = 26)

LBP

(n = 33)

Group

p-value

Sex

p-value

Group by

Sex

p-value


Percent Shear Strain

64.70 ± 5.17

50.88 ± 3.77

75.36 ± 5.02

62.73 ± 5.18

.007

.02

.90

Perimuscular

Thickness*

0.37 ± 0.04a

0.49 ± 0.03b

0.41 ± 0.03a

0.41 ± 0.03a

.07

.50

.09

Perimuscular

Echogenicity*

0.13 ± 0.01

0.16 ± 0.01

0.14 ± 0.01

0.15 ± .01

.007

.92

.30

Flexion Range

of Motion

53.90 ± 1.88

46.38 ± 2.27

53.58 ± 1.84

52.13 ± 1.78

.03

.19

.15

Extension Range

of Motion

16.90 ± 1.89a

9.74 ± 0.86b

16.89 ± 1.55a

16.28 ± 1.92a

.02

.04

.04

Lateral Flexion

19.51 ± 0.68a

17.07 ± 0.61b

18.02 ± 0.67a

18.23 ± 0.61a

.09

.80

.04

Repeated Trunk

Flexion*

7.97 ± 0.52

9.88 ± 0.41

8.27 ± 0.45

9.64 ± 0.41

<.001

.94

.56

Repeated Sit to

Stand

10.71 ± 0.43a

13.42 ± 0.62b

11.90 ± 0.54a

12.67 ± 0.41a

.002

.69

.08

50 Foot Walk

Regular Speed*

10.64 ± 0.35

11.58 ± 0.27

11.19 ± 0.30

11.97 ± 0.28

.005

.12

.80

50 Foot Walk

Fast Speed*

6.82 ± 0.26

7.56 ± 0.20

7.25 ± 0.22

8.24 ± 0.21

<.001

.71

.57

Sorensen's*

126.5 ± 10.1a

104.9 ± 7.9a

139.2 ± 8.9a

85.7 ± 8.1b

<.001

.71

.08


Note: tabled values are mean ± SE unless otherwise indicated. Variables denoted by an asterisk indicate values are least square mean ± SE, which are adjusted for BMI. For those variables in which there was evidence that differences between LBP and No LBP were dependent on sex (i.e. group by sex interaction p <.10), group comparisons were performed within males and females. Superscripts a and b indicate that group means not sharing a common letter are significantly different within each sex (Fisher's LSD, p <.05).

Langevin et al. BMC Musculoskeletal Disorders 2011 12:203   doi:10.1186/1471-2474-12-203

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