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Table 2 Percentage position on the distance C7 to PSIS

From: Determination of thoracic and lumbar spinal processes by their percentage position between C7 and the PSIS level

Variable

Value

Lower limit

Upper limit

C7-PSIS

100%

  

T4

21.0%

20.0%

21.9%

T7

39.0%

38.0%

40.0%

T10

54.1%

52.8%

55.4%

L1

70.9%

69.5%

72.3%

L4

86.1%

85.0%

87.2%

  1. Table2 (values are means, limits are 95% confidence limits according to a t-distribution with 21 degrees of freedom), C7-PSIS = distance between spinal process of the seventh cervical vertebrae and the posterior superior iliac spine, T4, T7, T10, L1 and L4 = spinal process of the fourth, seventh and tenth thoracic, and first and fourth lumbar vertebrae.