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Table 1 Demographic characteristics of the autism and control groups

From: Health-related risky behaviors in Chinese adolescents with autism: a cross-sectional study

Items Autism group (n = 150) Control group (n = 150) Z/χ2 P
Age, median (min, max) 14.5 (12.0, 19.1) 14.5 (12.1, 19.0) 0.401 0.688
Gender    0.00 0.9999
 Female 24 24   
 Male 126 126   
IQ (Mean ± standard deviation) 91.09 ± 4.72   
Residence    1.998 0.368
 City 130 137   
 Town 17 10   
 Rural area 3 3   
Paternal education (%)    33.48  < 0.001
 Primary school 1 (0.7) 2 (1.33)   
 Middle school 6 (4.0) 26 (17.33)   
 High school 26 (17.3) 40 (26.67)   
 Undergraduate 88 (58.7) 77 (51.33)   
 Postgraduate 29 (19.3) 5 (3.34)   
Maternal education (%)    37.01  < 0.001
 Primary school 1 (0.7) 6 (4.00)   
 Middle school 5 (3.3) 25 (16.67)   
 High school 25 (16.7) 40 (26.67)   
 Undergraduate 95 (63.3) 75 (50.00)   
 Postgraduate 24 (16.0) 4 (2.66)   
Family relationship (%)    2.013 0.57
 Harmonious 103 (68.7) 106 (70.67)   
 Fine 42 (28.0) 35 (23.33)   
 Disharmony 4 (2.7) 8 (5.33)   
 Parents divorced 1 (0.7) 1 (0.67)   
Financial situation (annual income CNY, %)    16.385 0.003
 < 30,000 19 (12.7) 12 (8.0)   
 30,000–50,000 42 (28.0) 21 (14.0)   
 50,000–70,000 29 (19.3) 33 (22.0)   
 70,000–100,000 31 (20.7) 30 (20.0)   
 > 100,000 29 (19.3) 54 (36.0)   
Family history of mental illness (%)    5.91 0.015
 Positive 14 (9.33) 4 (2.67)   
 Negative 136 (88.0) 146 (97.33)   
  1. Residence:1 = city, 2 = town, 3 = rural area
  2. Father’s education background:1 = Primary School, 2 = Middle School, 3 = High School, 4 = Undergraduate, 5 = Postgraduate
  3. Mother’s education background: 1 = Primary School, 2 = Middle School, 3 = High School, 4 = Undergraduate, 5 = Postgraduate
  4. Family financial situation (annual income: yuan): 1 =  < 30,000, 2 = 30,000 ~ 50,000, 3 = 50,000 ~ 70,000, 4 = 70,000 ~ 100,000, 5 =  > 100,000
  5. Family relationship: 1 = Harmonious, 2 = Fine, 3 = Disharmony, 4 = Parents Divorced