Table 1 Demographic and clinical information of FES and HCs.

From: Associations between urban birth or childhood trauma and first-episode schizophrenia mediated by low IQ

Variable

All participants

Analysis

 

FES (n = 144)

HCs (n = 256)

Test statistic

P

Male sex, n (%)

64 (44.44)

82 (32.03)

χ2 = 6.127

0.013

Age (mean, SD)

23.50 (6.71)

23.71 (5.21)

t = 0.343

0.366

BMI (mean, SD)

20.72 (3.26)

20.82 (2.94)

t = 0.314

0.377

Education (years) (mean, SD)

12.38 (2.70)

15.75 (2.29)

t = 13.233

< 0.001

CTQ (mean, SD)

43.31 (13.40)

32.05 (7.07)

t = 10.923

< 0.001

Birthplace (urban, n, %)

58 (40.28)

113 (44.14)

χ2 = 0.562

0.454

Immigration (%)

25 (17.36)

65 (25.39)

χ2 = 3.408

0.065

FSIQ (mean, SD)

95.49 (14.10)

116.97 (11.32)

t = 13.676

< 0.001

DUP (months) (mean, SD)

15.16 (19.48)

–

–

–

Age of onset (mean, SD)

21.83 (6.20)

–

–

–

GAF (mean, SD)

47.82 (12.39)

   

PANSS (mean, SD)

    

Positive score

22.39 (6.18)

–

–

–

Negative score

21.82 (7.68)

–

–

–

General score

41.64 (10.70)

–

–

–

Total score

85.86 (20.10)

–

–

–

  1. FES first-episode schizophrenia, HCs healthy controls, BMI body mass index, CTQ childhood trauma questionnaires, FSIQ the full scale of IQ, DUP duration of untreated psychosis, GAF global assessment function, PANSS Positive and Negative Syndrome Scale, SD standard deviation.
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