Incidence of Chronic IH

The Incidence of Chronic Idiopathic Intracranial Hypertension (IIH)
The incidence of chronic idiopathic intracranial hypertension for the general population is approximately 1 in 100,000. However, the incidence of chronic IIH for overweight women, 20-40 years old, is 20 in 100,000. By comparison, the incidence rate for invasive cervical cancer for the same group of women is only 9 in 100,000.

The Incidence of Chronic Secondary Intracranial Hypertension (SIH)
The incidence of chronic secondary intracranial hypertension (SIH) is not currently known because SIH is often recorded under a different diagnosis since no medical code exists for this form of chronic intracranial hypertension. It is also commonly misdiagnosed and has many causes, some confirmed and others unconfirmed.