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Table 1 Demographic and clinical variables of the study population

From: Do current screening recommendations allow for early detection of lithium-induced hyperparathyroidism in patients with bipolar disorder?

  Total Lithium Non-lithium p value
  (n= 51) (n= 23) (n= 28)  
Age (years), mean ± SD 46.57 ± 9.21 48.48 ± 8.98 45 ± 9.26 0.18
Gender (male/female) 31/20 14/9 17/11 1
Bipolar (I/II) 33/18 12/11 21/7 0.14
Age at onset (years), mean ± SD 25.14 ± 11.24 24.43 ± 10.86 25.71 ± 11.71 0.69
Number depressive episodes (mean ± SD) 12.98 ± 15,79 10.55 ± 11,69 15.04 ± 18.56 0.31
Number mania/hypomania (mean ± SD) 8.87 ± 11.78 6.62 ± 9.11 10.76 ± 13.53 0.22
Number of drugs (mean ± SD) 2.41 ± 1.22 2.57 ± 1.20 2.29 ± 1.24 0.42
Rapid cycling (no/yes) 46/5 22/1 24/4 0.35
HAMD (mean ± SD) 6.39 ± 5.05 4.61 ± 3.13 7.86 ± 5.86 0.02
BDI (mean ± SD) 32 ± 8.84a 29.39 ± 5.66 33.50 ± 10.93a 0.09
YMRS (mean ± SD) 2.10 ± 2,56 2.04 ± 2,01 2.14 ± 2.98 0.88
  1. aOne missing value. HAMD, Hamilton depression scale; BDI, Beck Depression Inventory; YMRS, Young Mania Rating Scale.