Estimating the Male to Female Ratio in Autistic Spectrum Disorder, Defining and Calculating the Biases and Finding the True Number of Girls.
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The ratio of males to females with ASD is generally quoted as 4:1 though it is believed that there are biases preventing females being diagnosed and that the true ratio is lower. These biases have not been clearly identified or quantified. Starting with a clinical dataset of 1711 children <18 years old four different methods were employed in an inductive study to identify and quantify the biases and calculate the proportion of females missed. A mathematical model was constructed to compare the findings with current published data. The true male to female ratio appears to be 3:4. Eighty per cent of females remain undiagnosed at age 18 which has serious consequences for the mental health of young women.
2014 ◽
Vol 25
(1)
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pp. 38-48
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1985 ◽
Vol 63
(5)
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pp. 669-675
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