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Table 3 Comparison between MAT and CON for all MRI-based calculated spine angles

From: Effect of a mattress on lumbar spine alignment in supine position in healthy subjects: an MRI study

 

CON

MAT

Difference

p value

ES

Total (n = 20)

 L1–L5

34.7 ± 7.1

37.6 ± 6.5

+2.9

< 0.001

0.34, small

 L1–S1

47.1 ± 6.7

47.9 ± 7.2

+0.8

0.236

NA

 L5–S1

12.4 ± 3.3

10.8 ± 3.1

−1.6

0.008

0.50, small

 SS

37.4 ± 5.2

39.4 ± 5.6

+2.0

< 0.001

0.37, small

Females (n = 10)

 L1–L5

35.5 ± 7.9

37.1 ± 7.5

+1.6

0.082

NA

 L1–S1

49.0 ± 6.5

48.5 ± 8.0

−0.5

0.678

NA

 L5–S1

13.5 ± 2.9

11.4 ± 3.3

−2.1

0.052

NA

 SS

37.4 ± 5.9

39.5 ± 6.3

+2.1

0.009

0.34, small

Males (n = 10)

 L1–L5

34.0 ± 6.4

37.0 ± 5.7

+3.0

< 0.001

0.50, small

 L1–S1

45.3 ± 6.7

47.3 ± 6.7

+2.0

0.006

0.30, small

 L5–S1

11.3 ± 3.4

10.2 ± 2.9

−1.1

0.067

NA

 SS

37.3 ± 4.8

39.3 ± 5.2

+2.0

0.019

0.40, small

  1. Data are degrees reported as mean ± standard deviation. CON control, ES effect size (Cohen d), MAT Mattress, MRI Magnetic resoance imaging, NA Not applicable, SS sacral slope