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Table 2 Mean dosage of antipsychotics according to co-prescription of antiparkinsonians (univariate analysis)

From: Antipsychotics dosage and antiparkinsonian prescriptions

   All prescriptions
(n = 5712)
  Prescriptions with no antiparkinsonian
(n = 4148)
Prescriptions with antiparkinsonian
(n = 1564)
Comparisons of means
  n Mean dosage mg (chlorpromazine equivalents) [CI95%] Range of dosage Median (min-max) n Mean dosage n Mean dosage t p
olanzapine 1278 10,9 (218)
[10,6–11,3]
10 (5–30) 1104 10,7 174 11,3 0,84 0,4
risperidone 713 3,5 (175)
[3,3–3,7]
4 (0,5–12) 590 3,2 123 5,3 7,8 <0,0001
amisulpride 967 365 (243)
[346–382]
200 (50–1200) 627 298 340 468,2 10,1 <0,0001
clozapine 44 90,6 (181)
[75,8–115,5]
75 (12,5–450) 41 89,9 3 100,0 0,8 0,05
haloperidol 452 6,6 (330)
[6,1–7,2]
5 (0,1–30) 173 3,9 279 8,4 68,9 <0,0001