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Table 1 Demographic and clinical characteristics of the three groups

From: Poorer sustained attention in bipolar I than bipolar II disorder

  Control, mean ± SD (N = 20) Bipolar disorder, mean ± SD Analysis
   BP I (N = 22) BP II (N = 29) F/χ 2 P value
Age 34.00 ± 12.34 34.05 ± 11.91 34.41 ± 12.19 0.009 0.991
HDRS - 4.36 ± 2.73 5.90 ± 2.88 36.91 <0.001
YMRS - 1.86 ± 2.55 3.76 ± 2.66 17.22 <0.001
Illness duration - 10.40 ± 8.80 11.83 ± 11.78 -0.42 0.676
Educational level 14.65 ± 2.35 13.05 ± 2.99 14.45 ± 3.09 2.067 0.134
Male, N (%) 8 (40.0%) 9 (40.9%) 15 (51.7%) 0.88 0.644
  1. BP = bipolar disorder; HDRS = Hamilton Depression Rating Scale; YMRS = Young Mania Rating Scale.
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