Ten-Year Surgical Outcomes and Prognostic Factors for French-Door Laminoplasty in the Treatment of Multilevel Cervical Spondylotic Myelopathy

Table 5

The clinical and radiographic outcomes at the last follow-up based on gender, age, surgical method, and preoperative intramedullar signal of T2W MRI.

Case		The recovery rate of mJOA score (%)		The loss rate of Cobb angle (%)		The preservation rate of range of motion (%)
		Mean value		Mean value		Mean value
Gender
Male	46		0.375		0.979		0.003
Female	18
Age at surgery
60 y	38		0.976		0.589		0.325
≥60 y	26
Preoperative intramedullar signal of T2W MRI
High	34		0.000		0.314		0.125
Equal or low	30
Canal narrowing ratio
≥50%	27		0.001		0.745		0.067
50%	38

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