Boys are __ times more likely to have autism.

Boys are __ times more likely to have autism.

• A. 2
• B. 3
• C. 4
• D. 5

Answer: (C)

Autism spectrum disorder shows a clear sex difference: boys are diagnosed far more often than girls. The prevalence data most commonly cite that boys are about four times as likely to have autism. This fourfold difference is widely used in teaching because multiple studies across populations point to roughly a 4:1 male-to-female ratio, though exact numbers can vary with how cases are identified and the age studied. So the blank is filled with four. Keep in mind that some datasets show ratios closer to 3:1 or higher around 5:1, but four is the standard, widely remembered figure.

Autism spectrum disorder shows a clear sex difference: boys are diagnosed far more often than girls. The prevalence data most commonly cite that boys are about four times as likely to have autism. This fourfold difference is widely used in teaching because multiple studies across populations point to roughly a 4:1 male-to-female ratio, though exact numbers can vary with how cases are identified and the age studied. So the blank is filled with four.

Keep in mind that some datasets show ratios closer to 3:1 or higher around 5:1, but four is the standard, widely remembered figure.