Table 1 Patterns of clinical triad findings in relation to the number of fused cervical segments from C1 to T1 in KFS patients

Short Neck

n = 26, 3.3 (1–7, 1.7)

n = 5, 4.0 (1–6, 1.9)

0.368

Low Posterior Hairline

n = 26, 3.4 (1–7, 1.7)

n = 5, 3.4 (1–5, 1.8)

0.891

Limited Cervical ROM

n = 11, 2.5 (1–5, 1.6)

n = 20, 3.9 (1–7, 1.6)

0.028 ^a

One CTFs

n = 11, 2.5 (1–5, 1.6)

n = 20, 3.9 (1–7, 1.6)

0.028 ^a

Two CTFs

n = 26, 3.2 (1–7, 1.7)

n = 5, 4.6 (2–6, 1.5)

0.056

Complete CTFs

n = 28, 3.4 (1–7, 1.8)

n = 3, 3.0 (1–4, 1.7)

0.659