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Table 2 Patient characteristics for the cohorts covered by the three normalization methods. Diagnoses are coded in International Classification of Diseases version 10

From: Association between antipsychotic drug dose and length of clinical notes: a proxy of disease severity?

Normalization method

DDD n (%)

Olanzapine equivalents n (%)

Chlorpromazine equivalents n (%)

Number of patients

1589

1539

438

Male sex

1043 (65.6)

1010 (65.6)

287 (65.5)

Mean age in years (SD)

40.3 (6.3)

40.1 (6.4)

40.1 (6.3)

Diagnoses

 F10 Alcohol related disorders

666 (41.9)

645 (41.9)

149 (34.0)

 F11 Opioid related disorders

266 (16.7)

256 (16.6)

66 (15.1)

 F12 Cannabis related disorders

476 (30.0)

458 (29.8)

130 (29.7)

 F13 Sedative, hypnotic, or anxiolytic related disorders

255 (16.0)

247 (16.0)

57 (13.0)

 F14 Cocaine related disorders

189 (11.9)

182 (11.8)

41 (9.4)

 F15 Other stimulant related disorders

126 (7.9)

122 (7.9)

28 (6.4)

 F19 Other psychoactive substance related disorders

225 (14.2)

218 (14.2)

60 (13.7)

 F20 Schizophrenia

740 (46.6)

707 (45.9)

197 (45.0)

 F21 Schizotypal disorder

105 (6.6)

103 (6.7)

28 (6.4)

 F22 Delusional disorder

56 (3.5)

54 (4.9)

20 (4.6)

 F23 Brief psychotic disorder

25 (1.6)

25 (1.6)

10 (2.3)

 F25 Schizoaffective disorder

50 (3.1)

49 (4.9)

13 (3.0)

 F31 Bipolar disorder

98 (6.2)

97 (6.3)

26 (5.9)

 F32 Mayor depressive disorder, single episode

120 (7.6)

119 (7.7)

18 (4.1)

 F33 Mayor depressive disorder, recurrent

197 (12.4)

193 (12.5)

40 (9.1)

 F41 Other anxiety disorders

162 (10.2)

159 (10.3)

33 (7.5)

 F60 Specific personality disorders

329 (20.7)

325 (21.1)

80 (18.3)

 Z046 Encounter for general psychiatric examination, requested by authority

266 (16.7)

250 (16.2)

66 (15.1)