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Table 3 Zinc serum level and zinc deficiency during the pre- and postoperative period and in different groups of BMI, sex, and underlying diseases

From: The prevalence of zinc deficiency in morbidly obese patients before and after different types of bariatric surgery

  Zinc serum level (μg/dl), mean (SD) P-value Zinc deficiency, n (%) P-value
Preoperative 89.96 (21.04) a < 0.001 42 (10.2)
At 3 months 89.99 (26.35) b   67 (16.2)  
At 6 months 79.16 (18.39) a b   119 (28.8)  
At 12 months 80.07 (17.92) a b   112 (27.1)  
Group variables
BMI   0.044   0.372
 35 ≤ BMI < 40 (n = 44) 95.79 (33.92)   4 (9.1)  
 40 ≤ BMI ≤ 50 (n = 277) 87.97 (18.06)a   32 (11.6)  
 BMI > 50 (n = 92) 93.16 (20.77)a   6 (6.5)  
Sex   0.038   0.029
 Female (n = 344) 89.43 (21.99)   40 (11.6)  
 Male (n = 69) 92.58 (15.28)   2 (2.9)  
HTN   0.210   0.689
 Yes (n = 79) 87.37 (18.11)   9 (11.4)  
 No (n = 334) 90.57 (21.65)   33 (9.9)  
Impaired FBS   0.227   0.027
 Yes (n = 76) 87.70 (22.12)   13 (17.1)  
 No (n = 337) 90.47 (20.78)   29 (8.6)  
DM Type II   0.503   0.047
 Yes (n = 76) 92.25 (26.10)   3 (3.9)  
 No (n = 337) 89.44 (19.73)   39 (11.6)  
Hyperlipidemia   0.584   0.308
 Yes (n = 188) 90.78 (22.50)   16 (8.5)  
 No (n = 225) 89.27 (19.75)   26 (11.6)  
Hypothyroidism   0.861   0.376
 Yes (n = 91) 90.42 (20.95)   7 (7.7)  
 No (n = 322) 89.83 (21.09)   35 (10.9)  
  1. Abbreviations: BMI Body mass index, HTN Hypertension, FBS Fasting blood sugar, DM Diabetes mellitus, SD Standard deviation
  2. a, and b indicate differences between groups