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Table 1 Clinical characteristics, radiological findings, and osteotomy methods in 428 AS patients

From: Clinical results and surgery tactics of spinal osteotomy for ankylosing spondylitis kyphosis: experience of 428 patients

Variable

Value*

Sex

 Male

392

 Female

36

Age (years)

 Mean

34.8

 Range

18–60

Osteotomy method

 One-level

339

 Two-level

89

Duration of AS (years)

 Mean

14.2

 Range

3.3–36.2

GK (°)

 Mean

59.6

 Range

32.4–110.6

SVA (cm)

 Mean

21.3

 Range

6.3–49.5

CBVA (°)

 Mean

51.5

 Range

28–108.1

Follow-up (years)

 Mean

2.8

 Range

2.4–14

  1. GK global kyphosis, SVA sagittal vertical axis, CBVA chin-brow vertical angle
  2. *Values represent the number of patients, unless otherwise indicated