One study found religious delusions to not be related to a specific group of diagnostic criteria.

In one study of 193 people who had previously been admitted to hospital and subsequently diagnosed with schizophrenia, 24% were found to have religious delusions.

In the context of presentation they were found to have functioning globally, worse than another group of patients without religious delusions.

An example of religious delusion without schizophrenia would be churchgoers speaking in tongues or feeling the "hand of God" upon them.

In a study of patients with schizophrenia that had been previously admitted to a hospital, 24% had had religious delusions.

It has also been shown that those who suffer from religious delusions are less likely to continue long-term treatment.

Patients suffering from schizophrenia, grandiose and religious delusions are found to be the least susceptible to cognitive behavioral interventions.

Some of the recent ones are classic religious delusions.

Men, on the other hand, seem to have religious delusions and delusions of grandeur (Berner et al. 1979).

De Kuff is a middle aged manic-depressive, prone to religious delusions.