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Table 1 Demographic characteristics and olfactory performance scores

From: Olfactory impairment in first-episode schizophrenia: a case-control study, and sex dimorphism in the relationship between olfactory impairment and psychotic symptoms

  Schizophrenia Healthy t
n = 110 (male: 66;female:44) n = 110 (male:66;female:44)
Age, mean (SD) in years 22.86 (4.61) 23.46 (4.18) 5265 (Mann-Whitney)
 M 22.85 (4.69) 24.47 (4.80) 1737*
 F 22.89 (4.56) 22.00 (2.40) 967
Sex, N (p)
 M 66 66 0 (χ2)
 F 44 44  
Smoking 21 (19.1) 8 (7.3) 6.7*(χ2)
 M 19 (28.79) 8 (12.12) 5.63*(χ2)
 F 2 (4.54) 0 2.05(χ2)
SST, mean (SD) in score
 Threshold 5.98 (2.77) 8.75 (3.18) 6.89**
  M 5.92 (3.08) 8.92 (3.28) 5.42**
  F 6.07 (2.25) 8.50 (3.05) 4.26**
 Discrimination 8.73 (3.55) 12.44 (1.79) 9.80**
  M 8.62 (3.82) 12.55 (1.76) 7.58**
  F 8.89 (3.13) 12.27 (1.84) 6.20**
 Identification 10.60 (2.73) 13.02 (1.72) 7.12**
  M 10.09 (3.00) 13.14 (1.76) 6.99**
  F 11.36 (2.09) 12.84 (1.66) 3.67**
 TDI 25.31 (6.65) 34.21 (4.98) 11.23**
  M 24.64 (7.24) 34.61 (5.09) 9.15**
  F 26.32 (5.58) 33.61 (4.81) 6.57**
  1. SST the Sniffin’ sticks test, M Male, F Female, TDI the total score of threshold, discrimination and identification
  2. *: P < 0.05; **: P < 0.01