Variables | Premenopausal group | Early postmenopausal group | Late postmenopausal group | P value |
---|---|---|---|---|
No. of patients (n) | 38 | 28 | 25 | Â |
Age (years) | 43.82 (5.32) | 54.89 (4.20) | 66.76 (4.27) | < 0.001 |
Intraoperative time (min) | 120.00 (120.00–180.00) | 120.00 (120.00–120.00) | 120.00 (120.00–180.00) | 0.399 |
Blood loss (ml) | 50.00 (30.00–50.00) | 50.00 (32.50–75.00) | 50.00 (30.00–55.00) | 0.595 |
Follow-up period (month) | 15.50 (12.00–24.75) | 12.00 (12.00–18.00) | 12.00 (12.00–24.00) | 0.312 |
BMI (kg/m2) | 22.40 (20.83–24.56) | 23.66 (20.55–25.76) | 23.83 (22.27–27.12) | 0.165 |
BMD T value | 0.81 (1.16) | − 1.40 (0.98) | − 1.61 (1.09) | < 0.001 |
Surgery type | 0.713 | |||
 1 level | 22 | 16 | 12 |  |
 2 level | 16 | 12 | 13 | |
Serum calcium (mmol/l) | 2.26 (2.21–2.32) | 2.31 (2.24–2.39) | 2.30 (2.25–2.38) | 0.027 |
Serum phosphate (mmol/l) | 1.12 (1.05–1.21) | 1.18 (1.07–1.33) | 1.08 (1.04–1.19) | 0.141 |
Serum magnesium (mmol/l) | 0.87 (0.85–0.90) | 0.88 (0.83–0.93) | 0.89 (0.87–0.92) | 0.162 |