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Table 2 Distribution of biological variables in the samples

From: Cortisol levels in unmedicated patients with unipolar and bipolar major depression using hair and saliva specimens

  Major depression Healthy controls p-value
Unipolar depression Bipolar depression
Mean BMI (SD) 25.9 (4.5) 25.9 (7.2) 24.3 (3.6) 0.22
Mean waist circumference in cm (SD) 87.1 (12.9) 87.2 (17.3) 82.1 (10.7) 0.15
Follicular phase, n (%) 12 (20.3) 1 (8.3) 9 (22.5) 0.44
Medication, n (%) 22 (37.3) 3 (25) 13 (32.5) 0.70
Contraceptives, n (%) 3 (5.1) 2 (16.6) 10 (25) 0.04
Medical comorbidities, n (%) 12 (20.3) 2 (16.7) 2 (5.0) 0.07
Mean hair washes/week (SD) 3.9 (1.7) 5.7 (2.1) 4.5 (1.7) 0.02
Cosmetic treatmentsa, n (%) 33 (55.9) 9 (75) 27 (67.5) 0.47
  1. BMI body mass index, NA not applicable, SD standard deviation
  2. aDyeing, bleaching, permanent straightening or waving