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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 methodDDD n (%)Olanzapine equivalents n (%)Chlorpromazine equivalents n (%)
Number of patients15891539438
Male sex1043 (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 disorders666 (41.9)645 (41.9)149 (34.0)
 F11 Opioid related disorders266 (16.7)256 (16.6)66 (15.1)
 F12 Cannabis related disorders476 (30.0)458 (29.8)130 (29.7)
 F13 Sedative, hypnotic, or anxiolytic related disorders255 (16.0)247 (16.0)57 (13.0)
 F14 Cocaine related disorders189 (11.9)182 (11.8)41 (9.4)
 F15 Other stimulant related disorders126 (7.9)122 (7.9)28 (6.4)
 F19 Other psychoactive substance related disorders225 (14.2)218 (14.2)60 (13.7)
 F20 Schizophrenia740 (46.6)707 (45.9)197 (45.0)
 F21 Schizotypal disorder105 (6.6)103 (6.7)28 (6.4)
 F22 Delusional disorder56 (3.5)54 (4.9)20 (4.6)
 F23 Brief psychotic disorder25 (1.6)25 (1.6)10 (2.3)
 F25 Schizoaffective disorder50 (3.1)49 (4.9)13 (3.0)
 F31 Bipolar disorder98 (6.2)97 (6.3)26 (5.9)
 F32 Mayor depressive disorder, single episode120 (7.6)119 (7.7)18 (4.1)
 F33 Mayor depressive disorder, recurrent197 (12.4)193 (12.5)40 (9.1)
 F41 Other anxiety disorders162 (10.2)159 (10.3)33 (7.5)
 F60 Specific personality disorders329 (20.7)325 (21.1)80 (18.3)
 Z046 Encounter for general psychiatric examination, requested by authority266 (16.7)250 (16.2)66 (15.1)