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Table 5 Repeated-measures analysis of variance assessments at baseline and after six and twelve weeks of treatment

From: Efficacy and tolerability of quetiapine versus haloperidol in first-episode schizophrenia: a randomized clinical trial

  Group effect Time effect Interaction
  F df p F df p F df p
PANSS positive 0.433 1,33 0.51 47.748 1.9,62.2 <0.0001 18.72 1.6,52.4 <0.0001
PANSS negative 1.575 1,33 0.21 186.771 1.1,35.7 <0.0001 5.20 1.1,35.7 <0.0001
PANSS general psychopathology 16.186 1,33 <0.0001 55.972 1.9,63.7 <0.0001 1.7 1.1,36.3 0.19
PANSS depression/anxiety 83.049 1,33 <0.0001 115.78 1.38,45.7 <0.0001 106.49 1.14,37.8 <0.0001
PANSS total 1.006 1,33 0.32 186.397 1.4,47.5 <0.0001 7.51 1.4,45.6 0.001
GAF 0.000 1,33 0.993 522.74 1.35,44.5 <0.0001 1.66 1.23,40.6 0.197
SAS 497.46 1,33 <0.0001 391.60 1.9,62.6 <0.0001 320.43 1.9,63.3 <0.0001
  1. df = degrees of freedom; F = F-test; GAF = Global Assessment of Functioning; p = p-value; PANSS = Positive and Negative symptoms Scale; SAS = Simpson Angus scale.