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Table 2 Hypocalcemia treated postoperatively and prescribed supplements. Rates of postoperative hypocalcemia, rates of prescribed supplements at discharge and rates of prescribed supplements at six-months follow-up. Presented for the whole study population 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

TOTAL Dark group Bright group P-value
Hypocalcemia
Treated postoperatively 731/2084 (35.1%) 530/1786 (29.7%) < 0.001
Supplements prescribed at discharge
Vitamin D 349/2084 (16.7%) 247/1786 (13.8%) 0.012
Calcium 651/2084 (31.2%) 468/1786 (26.2%) < 0.001
Both Calcium and Vitamin D 302/2084 (15.5%) 205/1786 (11,5%) 0.006
Supplements prescribed at 6 month follow up
Vitamin D 78/1853 (4.2%) 56/1536 (3.6%) 0.352
Calcium 121/1853 (6.5%) 65/1536 (4.2%) 0.003
Both Calcium and Vitamin D 57/1838 (3,1%) 38/1530 (2,5%) 0.2811
MALIGNANCY
Hypocalcemia
Treated postoperatively 168/433 (38.8%) 152/387 (39.3%) 0.889
Supplements prescribed at discharge
Vitamin D 103/433 (23.8%) 88/387 (22.7%) 0.723
Calcium 153/433 (35.3%) 138/387 (35.7%) 0.923
Supplements prescribed at 6 month follow up
Vitamin D 27/396 (6.8%) 27/351 (7.7%) 0.645
Calcium 40/395 (10.1%) 30/344 (8.7%) 0.515
GOITER
Hypocalcemia
Treated postoperatively 166/578 (28.7%) 104 (22.1%) 0.015
Supplements prescribed at discharge
Vitamin D 65/578 (11.2%) 43/470 (9.5%) 0.267
Calcium 140/578 (24.2%) 106/470 (22.6%) 0.526
Supplements prescribed at 6 month follow up
Vitamin D 20/527 (3.8%) 6/413 (1.5%) 0.030
Calcium 31/522 (5.9%) 8/405 (2.0%) 0.003
THYROTOXICOSIS
Hypocalcemia
Treated postoperatively 393/1062 (37.0%) 272/921 (29.5%) < 0.001
Supplements prescribed at discharge
Vitamin D 181/1062 (17.0%) 115/921 (12.5%) 0.005
Calcium 357/1062 (33.6%) 223/921 (24.2%) < 0.001
Supplements prescribed at 6 month follow up
Vitamin D 31/930 (3.3%) 23/798 (2.9%) 0.591
Calcium 50/926 (5.4%) 27/780 (3.5%) 0.055