Hello- Thank you for asking the question. I have over 35 years of experience working with individuals, couples and families & am happy to reply.
I am happy to help you with this.
It is true the the average onset in males is approximately 18 vs females who have a later age on set- typically between age 21 and 25. The prevalence of this disorder is equal between the genders - meaning schizophrenia is equally common in numbers among men and women.
It is important to note that persons can have later life diagnosis of schizophrenia-(although rare) diagnosis can occur as late as age 45 years of age.
So - the average onset between men and women is approximately 20 years of age.
The above graph provide a representation of presentation of symptoms diagnosis and treatment.
So your teacher is correct the onset is earlier in males but the average age is 20.5 although symptoms can develop earlier and many men are diagnoses before the average.
Further detail on this is linked below.
Should you have additional questions of me- feel free to ask- I am happy to help.
Kindest regards, Bil
Awesome. Very informative answer. Is she correct to say that risk goes down as you age?