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Table 1 Basic demographic and clinical characteristics of the study sample

From: A comparison of the 33-item Hypomania Checklist with the 33-item Hypomania Checklist-external assessment for the detection of bipolar disorder in adolescents

Variables Whole sample (n = 260) MDD (n = 113) BD (n = 147) BD vs MDD
N % N % N % χ2 P
Male gender 59 22.69 31 27.43 28 19.05 2.561 0.110
  Mean SD Mean SD Mean SD Z* P
Age (years) 15.42 1.62 15.30 1.51 15.51 1.70 − 1.015 0.310
Education level (years) 9.76 1.94 9.45 1.93 10.00 1.93 − 1.848 0.065
Age of onset (years) 14.33 4.21 14.21 5.40 14.41 3.01 − 1.170 0.242
Number of episodes 1.20 0.85 1.24 1.18 1.17 0.46 − 0.294 0.768
  1. BD bipolar disorder, MDD major depressive disorder, SD standard deviation
  2. *Mann–Whitney U test