Masaaki Machino1, Kei Ando1, Kazuyoshi Kobayashi1, Masayoshi Morozumi1, Satoshi Tanaka1, Keigo Ito2, Fumihiko Kato2, Naoki Ishiguro1, Shiro Imagama3. 1. Department of Orthopedic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan. 2. Department of Orthopedic Surgery, Chubu Rosai Hospital, Japan Organization of Occupational Health and Safety, Nagoya, Japan. 3. Department of Orthopedic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan. Electronic address: imagama@med.nagoya-u.ac.jp.
Abstract
OBJECTIVES: The purpose of this study was to establish the clinical cut-off values of the 10-s grip and release (G&R) and 10-s step quantitative tests for the diagnosis of cervical spondylotic myelopathy (CSM) and to elucidate the aging variation and gender difference of those values in a large cohort of healthy subjects. PATIENTS AND METHODS: Patients with CSM (n = 454) and asymptomatic subjects (n = 818) were included. Subjects were aged 40-70 years; according to their age, they were categorized by decades. The 10-s G&R and 10-s step tests were used to quantitatively assess performance. The receiver operating characteristic (ROC) curves were plotted to evaluate the cut-off value of the 10-s G&R and 10-s step tests for determining the presence or absence of CSM in each gender and decade. RESULTS: The cut-off values in the G&R test were 20 in 40 s, 19 in 50 s, 17 in 60 s, and 16 in 70 s groups respectively. The cut-off values in the 10-s step test were 19 in 40 s, 18 in 50 s, 16 in 60 s, and 15 in 70 s groups respectively. The cut-off value of the G&R test in females was lower than that in the males. The cut-off value of 10-s step test was lower in the females than in the males in 40 s and 50 s groups. CONCLUSIONS: The cut-off values in the 10-s G&R test and 10-s step decreased with age. When these quantifiable tests are used as screening tests of CSM, age and gender difference should be considered.
OBJECTIVES: The purpose of this study was to establish the clinical cut-off values of the 10-s grip and release (G&R) and 10-s step quantitative tests for the diagnosis of cervical spondylotic myelopathy (CSM) and to elucidate the aging variation and gender difference of those values in a large cohort of healthy subjects. PATIENTS AND METHODS: Patients with CSM (n = 454) and asymptomatic subjects (n = 818) were included. Subjects were aged 40-70 years; according to their age, they were categorized by decades. The 10-s G&R and 10-s step tests were used to quantitatively assess performance. The receiver operating characteristic (ROC) curves were plotted to evaluate the cut-off value of the 10-s G&R and 10-s step tests for determining the presence or absence of CSM in each gender and decade. RESULTS: The cut-off values in the G&R test were 20 in 40 s, 19 in 50 s, 17 in 60 s, and 16 in 70 s groups respectively. The cut-off values in the 10-s step test were 19 in 40 s, 18 in 50 s, 16 in 60 s, and 15 in 70 s groups respectively. The cut-off value of the G&R test in females was lower than that in the males. The cut-off value of 10-s step test was lower in the females than in the males in 40 s and 50 s groups. CONCLUSIONS: The cut-off values in the 10-s G&R test and 10-s step decreased with age. When these quantifiable tests are used as screening tests of CSM, age and gender difference should be considered.