Hi, welcome to HCM. Thanks for asking your query at this forum.
We understand your concern. I have read your question carefully and understood it. I will try my best to answer it.
As you told your partner is suffering from sleep problem and he got a little benefit with C-PAP machine even after one month of use.
Reduced/ disturbed sleep may be because of some psychiatric issues like
stress,
anxiety,
depression, other sleep disorders etc. Although he may appear to handle the occupational stress well, there is possibility of underlying stress and silent suffering. Since he has not benefited much with C-PAP, certainly he is having something more than
sleep apnea.
It will be wise to get him evaluated in detail for possibility of any psychiatric illness. At this point due to limited information provided it is difficult to say. If needed he may be investigated with brain imaging, sleep lab study,
hormonal assays etc and may be prescribed few medicines after diagnosis.
I hope it answers your query. I wish you both all the best.
This may happen in case of some