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Table 1 Patient characteristics. Presented in total and stratified by indication for surgery

From: Seasonal variation in calcium treatment after thyroidectomy as surrogate for post-operative hypocalcemia: a retrospective register-based national cohort study

  Dark group Bright group Total
TOTAL 2084 1790 3874
Sex, women, n (%) 1660 (79.7%) 1433 (80.1%) 3093 (79.8%)
Age, mean (range) 46.4 46.9 46.6 (0–94)
Parathyroid reimplantation, n (%) 548 (26.3%) 466 (26.0%) 1014 (26.2%)
MALIGNANCY 433 388 821
Sex, women n (%) 305 (70.4%) 256 (66.0%) 561 (68.3%)
Age, mean 50.9 53.4 52.0 (1–92)
Parathyroid reimplantation 171 (39.5%) 153 (39.4%) 324 (39.5%)
GOITER 578 471 1049
Sex, women n (%) 466 (80.6%) 388 (82.4%) 887 (81.4%)
Age, mean 54.8 55.0 54.9 (1–94)
Parathyroid reimplantation 110 (19.0%) 108 (22.9%) 218 (20.8%)
THYROTOXICOSIS 1062 923 1985
Sex, women n (%) 882 (83.1%) 784 (84.9%) 1692 (83.9%)
Age, mean 40.1 40.1 40.1 (0–88)
Parathyroid reimplantation 263 (24.8%) 205 (22.2%) 468 (23.6%)
Missing data on indication 11 8 19