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Table 4 Parent-report questionnaire data for the Latvia sample

From: Development of the Signposting Questionnaire for Autism (SQ-A): measurement comparison with the 10-item Autism Spectrum Quotient-Child and the Strengths and Difficulties Questionnaire in the UK and Latvia

  Whole sample (N = 104) ASD (N = 35) Other (N = 40) None (N = 29)
SQ-A
Mean (SD) 3.36 (2.99) 5.74 (3.09) 2.88 (2.12) 1.1 (1.37)
Range 0–12 1–12 0–8 0–6
Median (IQR) 3 (4) 6 (5) 3 (4) 1 (2)
Cronbach’s .79 .77 .56 .61‡
MIIC .2 .19 .06 .12
Correlation with AQ-10 and SDQ (Spearman’s rs)
AQ-10
SDQ
.72***
.59***
.50**
.41+
.55***
.53**
.35
.02
AQ-10     
Mean (SD) 5.1 (3.65) 8.17 (2.3) 4.83 (3.28) 1.72 (2.05)
Range 0–10 1–10 0–10 0–8
Median (IQR) 5 (8) 9 (3) 4.5 (6) 1 (3)
SDQ
Mean (SD) 17.4 (7.55) 21.8 (5.68) 18.36 (6.68)† 10.57 (5.92)†
Range 1–33 9–33 4–28 1–22
Median (IQR) 18 (12) 22 (7) 19 (8) 9.5 (9)
Correlation between AQ-10 and SDQ
Spearman’s rs .67*** .28 .63*** .31
  1. ASD autism spectrum disorder, AQ-10 Autism Spectrum Quotient-10-Child, MIIC mean inter-item correlation, SDQ Strengths and Difficulties Questionnaire, SQ-A Signposting Questionnaire for Autism
  2. ***p < .001; **p < .01; +p = .014 (above corrected threshold p < .01)
  3. †Missing = 1
  4. ‡Four items (2, 3, 7 and 13) had zero variance and were therefore removed from the reliability analysis