Table 1.
MDD patients' characteristics | MDD sample in total (n = 1410) | Male MDD patients (n = 467) | Female MDD patients (n = 943) | χ2/F | p Value (χ2/ANOVA) | AOR (95% CI)/F | p Value (regression analyses/ANCOVA) |
---|---|---|---|---|---|---|---|
Age, mean (SD), years | 50.3 (14.1) | 50.4 (13.8) | 50.2 (14.3) | 0.0 | .890 | ||
Ethnic origin, n (%) | |||||||
Caucasian | 1356 (96.2) | 451 (96.6) | 905 (96) | 0.3 | .578 | ||
Educational status, n (%) (n = 1395) | |||||||
University education/nonuniversity high education/high‐level general education | 755 (53.5) | 267 (57.5) | 488 (52.4) | 3.3 | .070 | ||
General secondary/technical education/elementary school/none | 640 (45.4) | 197 (42.5) | 443 (47.6) | ||||
Occupational status, n (%) (n = 1408) | |||||||
Employed | 659 (46.7) | 231 (49.5) | 428 (45.5) | 2.0 | .159 | ||
Unemployed | 749 (53.1) | 236 (50.5) | 513 (54.5) | ||||
Relationship status, n (%) | |||||||
With ongoing relationship | 703 (49.9) | 252 (54) | 451 (47.8) | 4.7 | .03 | 0.785 (0.627–0.984) | .036 |
Without ongoing relationship | 707 (50.1) | 215 (46) | 492 (52.2) | ||||
Major depressive episode, n (%) | |||||||
Single | 127 (9.0) | 39 (8.4) | 88 (9.3) | 0.4 | .545 | ||
Recurrent | 1283 (91.0) | 428 (91.6) | 855 (90.7) | ||||
Specific features, n (%) | |||||||
Psychotic features | 154 (10.9) | 57 (12.2) | 97 (10.3) | 1.2 | .277 | ||
Melancholic features | 856 (60.7) | 291 (62.3) | 565 (59.9) | 0.8 | .386 | ||
Atypical features | 33 (2.3) | 9 (1.9) | 24 (2.5) | 0.5 | .470 | ||
Catatonic features | 7 (0.5) | 2 (0.4) | 5 (0.5) | 0.1 | .798 | ||
Suicidalitya | |||||||
Current suicidal risk (dichotomous) | 649 (46.0) | 228 (48.8) | 421 (44.6) | 2.2 | .139 | ||
Degree of suicidal risk in patients with current suicidal risk, n (%) (n = 649) | |||||||
High/moderate | 377 (58.1) | 145 (63.6) | 232 (55.1) | 4.4 | .036 | 0.694 (0.497–0.970) | .033 |
Low | 272 (41.9) | 83 (36.4) | 189 (44.9) | ||||
Treatment setting, n (%) | |||||||
Inpatient | 488 (34.6) | 190 (40.7) | 298 (31.6) | 11.4 | <.001 | 0.713 (0.555–0.917) | .008 |
Outpatient | 922 (65.4) | 277 (59.3) | 645 (68.4) | ||||
Duration of the current MDE, mean (SD), days | 204.7 (164.6) | 200.4 (165.5) | 206.9 (164.3) | 0.4 | .536 | ||
Number of MDEs during lifetime, mean (SD) | 3.3 (2.5) | 3.2 (2.5) | 3.4 (2.4) | 0.7 | .412 | ||
Age of MDD onset, mean (SD), years | 37.2 (15.4) | 38.9 (15.4) | 36.4 (15.4) | 7.6 | .006 | 13.2 | <.001 |
Duration of psychiatric hospitalizations during lifetime, mean (SD), weeks (n = 1328) | 5.6 (20.5) | 6.0 (23.9) | 5.4 (18.5) | 0.2 | .641 | ||
Psychiatric comorbidities, n (%) | |||||||
Any anxiety disorder | 294 (20.9) | 101 (21.6) | 193 (20.5) | 0.3 | .614 | ||
Generalized anxiety disorder | 151 (10.7) | 51 (10.9) | 100 (10.6) | 0.0 | .857 | ||
Panic disorder | 114 (8.1) | 35 (7.5) | 79 (8.4) | 0.3 | .567 | ||
Agoraphobia | 113 (8.0) | 36 (7.7) | 77 (8.2) | 0.1 | .766 | ||
Social phobia | 45 (3.2) | 17 (3.6) | 28 (3.0) | 0.5 | .500 | ||
Obsessive–compulsive disorder | 22 (1.6) | 6 (1.3) | 16 (1.7) | 0.3 | .565 | ||
Posttraumatic stress disorder | 20 (1.4) | 5 (1.1) | 15 (1.6) | 0.6 | .437 | ||
Somatic comorbidities, n (%) | |||||||
Any somatic comorbidity | 653 (46.3) | 197 (42.2) | 456 (48.4) | 4.8 | .029 | 1.336 (1.056–1.690) | .016 |
Hypertension | 267 (18.9) | 102 (21.8) | 165 (17.5) | 3.8 | .05 | ||
Thyroid dysfunction | 204 (14.5) | 31 (6.6) | 173 (18.3) | 34.6 | <.001 | 3.466 (2.305–5.210) | <.001 |
Migraine | 156 (11.1) | 29 (6.2) | 127 (13.5) | 16.7 | <.001 | 2.425 (1.590–3.699) | <.001 |
Diabetes | 84 (6.0) | 34 (7.3) | 50 (5.3) | 2.2 | .140 | ||
Heart disease | 72 (5.1) | 31 (6.6) | 41 (4.3) | 3.4 | .066 | ||
Arthritis | 65 (4.6) | 19 (4.1) | 46 (4.9) | 0.5 | .495 | ||
Asthma | 48 (3.4) | 7 (1.5) | 41 (4.3) | 7.7 | .005 | 2.990 (1.328–6.730) | .008 |
Pain | 8 (0.6) | 2 (0.4) | 6 (0.6) | 0.2 | .625 | ||
Severity of depressive symptoms, mean (SD) | |||||||
HAM‐D total 21‐item at study entry | 19.8 (9.1) | 19.9 (8.8) | 19.7 (9.2) | 0.2 | .680 | ||
MADRS total at study entry (cMADRS) | 24.6 (11.3) | 24.5 (11.1) | 24.7 (11.4) | 0.1 | .763 | ||
MADRS total at onset of the current MDE (rMADRS) | 34.1 (7.7) | 34.5 (7.6) | 33.8 (7.7) | 2.5 | .117 | ||
Treatment response, n (%)b | |||||||
Response | 346 (24.5) | 121 (25.9) | 225 (23.9) | 2.4 | .300 | ||
Nonresponse | 492 (34.9) | 150 (32.1) | 342 (36.3) | ||||
Resistance | 572 (40.6) | 196 (42.0) | 376 (39.9) | ||||
MADRS total change (rMADRS–cMADRS), mean (SD) | −9.4 (10.8) | −10.0 (10.7) | −9.0 (10.8) | 2.4 | .124 | ||
Ongoing psychotherapy, n (%) (n = 1279) | |||||||
Any psychotherapy | 399 (28.3) | 128 (30) | 271 (31.8) | 0.4 | .505 | ||
Cognitive‐behavioral therapy | 292 (20.7) | 96 (22.5) | 196 (23) | 4.0 | .409 | ||
Psychoanalytic psychotherapy | 43 (3.0) | 16 (3.7) | 27 (3.2) | ||||
Systemic psychotherapy | 16 (1.1) | 6 (1.4) | 10 (1.2) | ||||
Other psychotherapy | 48 (3.4) | 10 (2.3) | 38 (4.5) | ||||
Ongoing psychopharmacotherapy | |||||||
Number of concurrently administered psychopharmacotherapeutics, mean (SD) | 2.18 (1.2) | 2.3 (1.2) | 2.1 (1.2) | 3.2 | .073 | ||
Administered first‐line antidepressant (in the current MDE), n (%) | |||||||
Selective serotonin reuptake inhibitors | 734 (52.1) | 233 (49.9) | 501 (53.1) | 1.3 | .252 | ||
Serotonin‐norepinephrine reuptake inhibitors | 336 (23.8) | 97 (20.8) | 239 (25.3) | 3.6 | .058 | ||
Noradrenergic and specific serotonergic antidepressants | 121 (8.6) | 57 (12.2) | 64 (6.8) | 11.7 | <.001 | 0.550 (0.375–0.807) | .002 |
Tricyclic antidepressants | 74 (5.2) | 29 (6.2) | 45 (4.8) | 1.3 | .254 | ||
Agomelatine | 69 (4.9) | 18 (3.9) | 51 (5.4) | 1.6 | .203 | ||
Noradrenaline‐dopamine reuptake inhibitors | 32 (2.3) | 15 (3.2) | 17 (1.8) | 2.8 | .094 | ||
Serotonin antagonist and reuptake inhibitors | 28 (2.0) | 10 (2.1) | 18 (1.9) | 0.1 | .768 | ||
Vortioxetine | 6 (0.4) | 3 (0.6) | 3 (0.3) | 0.8 | .379 | ||
Monoamine oxidase inhibitors | 5 (0.4) | 2 (0.4) | 3 (0.3) | 0.1 | .743 | ||
Noradrenaline reuptake inhibitors | 3 (0.2) | 2 (0.4) | 1 (0.1) | 1.5 | .217 | ||
Tianeptine | 2 (0.1) | 1 (0.2) | 1 (0.1) | 0.3 | .612 | ||
Fluoxetine equivalentsc, mean (SD), mg/day | 39.86 (20.8) | 42.6 (23.7) | 38.5 (19.0) | 11.2 | <.001 | 10.0 | .002 |
Employed psychopharmacotherapeutic combination and augmentation strategies (in addition to the ongoing antidepressant treatment), n (%) | |||||||
Any combination and augmentation treatment | 855 (60.6) | 304 (65.1) | 551 (58.4) | 5.8 | .016 | 0.771 (0.607–0.979) | .033 |
Combination with at least 1 additional antidepressant | 416 (29.5) | 157 (33.6) | 259 (27.5) | 5.7 | .017 | ||
Augmentation with at least 1 antipsychotic drug | 362 (25.7) | 132 (28.3) | 230 (24.4) | 2.5 | .117 | ||
Augmentation with at least 1 mood stabilizer | 159 (11.3) | 64 (13.7) | 95 (10.1) | 4.1 | .043 | 0.685 (0.486–0.966) | .031 |
Augmentation with pregabalin | 102 (7.2) | 33 (7.1) | 69 (7.3) | 0.0 | .864 | ||
Augmentation with at least 1 low‐potency antipsychoticd | 91 (6.5) | 25 (5.4) | 66 (7.0) | 1.4 | .237 | ||
Augmentation with benzodiazepines including zolpidem and zopiclone | 466 (33.0) | 148 (31.7) | 318 (33.7) | 0.6 | .446 |
Note: The p values indicated in bold were significant after Bonferroni–Holm correction.
Abbreviations: ANCOVA, analysis of covariance; ANOVA, analysis of variance; AOR, adjusted odds ratio; CI, confidence interval; HAM‐D, Hamilton Depression Rating Scale; MADRS, Montgomery Åsberg Depression Rating Scale (cMADRS, current MADRS; rMADRS, retrospective MADRS); MDD, major depressive disorder; MDE, major depressive episode; n, number of participants; SD, standard deviation.
The presence of the current suicidal risk was measured based on the HAM‐D item 3 (suicidality) ratings (Dold, Bartova, Fugger et al., 2018). While the absence of the current suicidal risk was based on an item score of 0 (absent), the presence of the current suicidal risk was represented by item scores of 1 (feels life is not worth living), 2 (wishes to be dead, or any thoughts of possible death to self), 3 (suicide ideas or gestures), or 4 (suicide attempts).
Nonresponse was defined by a previous single failed trial and treatment resistance by two or more failed trials (Bartova et al., 2019).
Fluoxetine dose equivalents were calculated according to Hayasaka et al. (2015).
Low‐potency antipsychotics comprise the so‐called low‐potency first‐generation antipsychotics and the second‐generation antipsychotic quetiapine less than 100 mg/day (Bartova et al., 2019).