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Table 1 Clinical characteristics of female and male OPLL and serum concentration of leptin, insulin, and ALP

From: Roles and mechanisms of leptin in osteogenic stimulation in cervical ossification of the posterior longitudinal ligament

Female OPLL versus non-OPLL
  Non-OPLL (n = 14) OPLL (n = 11) p (Student’s t)
Age (year) 61.95 ± 10.93 57.25 ± 8.68 N.S.
Height (cm) 1.61 ± 0.05 1.62 ± 0.05 N.S.
Weight (kg) 62.79 ± 9.86 66.83 ± 10.55 N.S.
BMI (kg/m) 24.10 ± 3.37 25.49 ± 3.05 N.S.
Serum leptin (ng/ml) 22.30 ± 9.21 37.68 ± 25.22 < 0.05
Leptin/BMI 0.93 ± 0.33 1.50 ± 0.97 < 0.05
Serum insulin (μU/ml) 19.00 ± 8.60 22.90 ± 13.20 N.S.
Serum ALP 7.17 ± 1.11 8.05 ± 0.73 < 0.05
Male OPLL versus non-OPLL
  Non-OPLL (n = 15) OPLL (n = 24) p (Student’s t)
Age (year) 57.4 ± 11.04 59.04 ± 9.32 N.S.
Height (cm) 170 ± 4.20 170 ± 7.07 N.S.
Weight (kg) 73.53 ± 13.68 76.61 ± 12.99 N.S.
BMI (kg/m) 25.26 ± 4.46 26.47 ± 3.46 N.S.
Serum leptin (ng/ml) 13.45 ± 6.32 16.69 ± 6.90 N.S.
leptin/BMI 0.52 ± 0.19 0.65 ± 0.25 N.S.
Serum insulin (μU/ml) 22.10 ± 11.00 29.20 ± 30.00 N.S.
Serum ALP 7.25 ± 1.57 7.97 ± 1.63 N.S.