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Table 1 Sociodemographic characteristics of the studied groups (n = 72)

From: Autistic traits in offspring of schizophrenic patients in comparison to those of normal population: a case-control study

Characteristics Case group (n = 36) Control group (n = 36) Test P value
Child age (years)
 Mean ± SD (range) 9.10 ± 2.28 (4–11) 9.80 ± 1.98 (4–11) 1.39a 0.167
 4–7 8 (22.2%) 5 (13.9%) 0.845b 0.358
 > 7–11 28 (77.8%) 31 (86.1%)
Child sex, No. (%)
 Male 20 (55.6) 17 (47.2) 0.500b 0.479
 Female 16 (44.4) 19 (52.8)
Child education, No. (%)
 Uneducated 5 (13.9) 3 (8.3) 1.272b 0.736
 Kindergarten 2 (5.5) 1 (2.8)
 Primary 25 (69.5) 29 (80.6)
 Preparatory 4 (11.1) 3 (8.3)
Fathers’ age (years)
 Mean ± SD (range) 47.3 ± 10.7 (20–65) 44.1 ± 10.0 (22–65) 1.322a 0.191
 20–39 11 (30.6%) 15 (41.7%) 1.382b 0.501
 40–59 21 (58.3%) 19 (52.8%)
 ≥ 60 4 (11.1%) 2 (5.5%)
Mothers’ age (years)
 Mean ± SD (range) 39.4 ± 13.8 (20–61) 40.5 ± 14.3 (20–60) 0.34a 0.731
 20–39 15 (41.7%) 13 (36.1%) 0.643b 0.725
 40–59 18 (50%) 18 (50%)
 ≥ 60 3 (8.3%) 5 (13.9%)
Fathers’ education, No. (%)
 Uneducated 26 (72.2) 19 (52.8) 2.90b 0.088
 Educated 10 (27.8) 17 (47.2)
Mothers’ education, No. (%)
 Uneducated 23 (63.9) 21 (58.3) 0.233b 0.629
 Educated 13 (36.1) 15 (41.7)
Fathers’ occupation, No. (%)
 Not working 15 (41.7) 14 (38.9) 0.057b 0.810
 Working 21 (58.3) 22 (61.1)
Mothers’ occupation, No. (%)
 Not working 33 (91.7) 29 (80.6) 1.858b 0.173
 Working 3 (8.3) 7 (19.4)
Family income, No. (%)
 Insufficient 24 (66.7) 19 (52.8) 1.443b 0.229
 Sufficient 12 (33.3) 17 (47.2)
Social class, No. (%)
 Low 28 (77.8) 32 (88.9) 1.60b 0.206
 Moderate 8 (22.2) 4 (11.1)
  1. aIndependent t-test
  2. bChi-square test (χ2)