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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