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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 depressionHealthy controlsp-value
Unipolar depressionBipolar 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