Table 2: Depression severity, perceived cognitive dysfunction and functional impairment.

n Values
CGI-S 664
Total Score (mean ± SD) 3.28 ± 0.99
By category:
          Normal (1) 26 (3.9%)
          Mild (2-3) 362 (54.5%)
          Moderate (4) 207 (31.2%)
          Severe (5-7) 69 (10.4%)
PHQ-9 664
Total Score (mean ± SD) 11.27 ± 6.92
By category:a
          No depression (0-4) 124 (18.7%)
          Mild depression (5-9) 179 (27.0%)
          Moderate depression (10-14) 143 (21.5%)
          Moderately severe depression (15-19) 121 (18.2%)
          Severe depression (20-27) 97 (14.6%)
PDQ-D 664
Total Score (mean ± SD) 22.59 ± 16.16
By category:
          1st quartile (0-9) 4.32 ± 2.99
          2nd quartile (10-19) 14.39 ± 2.89
          3rd quartile (20-31) 25.21 ± 3.66
          4th quartile (32-80) 44.37 ± 10.58
By domain:
          Attention/Concentration 6.21 ± 4.64
          Retrospective Memory 5.39 ± 4.41
          Prospective Memory 4.99 ± 3.88
          Planning/Organisation 6.00 ± 4.93
SDS 598b
Total Score (mean ± SD) 11.31 ± 7.94
By domain:
          Work/School Work 526c 4.21 ± 3.03
          Social life/Leisure Activities 664 3.86 ± 2.93
          Family Life/Home Responsibilities 664 3.83 ± 2.95

aPHQ-9 categories of severity were defined a priori: 0 to 4 (“no depression”), 5 to 9 (“mild depression”), 10 to 14 (“moderate depression”), 15 to 19 (“moderately severe depression”), 20 to 27 (“severe depression”).
bExcluding patients who had not worked/studied in the past week (n=66)
cExcluding patients who had not answered (n=72) and patients who had not worked/studied in the past week (n=66)