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Table 1 Characteristics of the original sample and the final sample

From: Major depressive disorder as a nonlinear dynamic system: bimodality in the frequency distribution of depressive symptoms over time

  Original sample Final sample
  (N = 267) (N = 178)
Sociodemographics   
Age, mean (SD) 42.8 (11.3) 43.4 (11.5)
Female, n (%) 171 (64 %) 121 (68 %)
Years of education, mean (SD) 12.5 (3.7) 12.5 (3.5)
Married/cohabiting, n (%) 172 (64.4 %) 117 (65.7 %)
Paid employment, n (%) 161 (60.3 %) 109 (61.2 %)
Number of chronic somatic diseases, median (IQR) 1 (0.5-1.5) 1 (0.5-1.5)
Treatment arm, n (%)   
Usual care by general practitioner 72 (27 %) 46 (26 %)
Psycho-education (PEP) 112 (42 %) 71 (40 %)
Psychiatric consultation + PEP 39 (15 %) 30 (17 %)
Cognitive Behavioral Therapy + PEP 44 (16 %) 31 (17 %)
Psychiatric Characteristics   
Beck Depression Inventory, mean (SD) 20.1 (9.4) 19.7 (9.2)
Number of previous episodes, median (IQR) 2 (0–4.5) 2 (0–4)
Age at first onset, mean (SD) 31.3 (13.2) 31.9 (13.0)
Antidepressant use, n (%) 198 (74 %) 134 (75 %)
Previous suicide attempt, n (%) 27 (10.1 %) 17 (9.6 %)
Past month comorbid psychiatric disorders, n (%)   
Dysthymia 22 (8.2 %) 13 (7.3 %)
Social phobia 41 (15.4 %) 22 (12.4 %)
Panic Disorder 34 (12.7 %) 19 (10.7 %)
Agoraphobia 22 (8.2 %) 18 (10.1 %)
  1. SD Standard deviation, IQR interquartile range