I am afraid that individual information on health is a personal record and exempted under Sec. 8 (1) Ij) as it amounts to an invasion on privacy. However, if the police have recorded a statement you can seek such information from Police.
Because she is a wife, it does not mean she is not having any individual rights to privacy. Whenever any application has to be rejected, before denying such information, PIO must seek comment from that person affected. The letter must be sent to the wife saying that so and so is seeking such information. Naturally, she files objections that it is personal information, as relations are strained. The application of this 8 1 (j) is peculiar. The wife can seek such information of husband in the larger public interest as a victim, and PIO provides that information. But, when a husband seeks the same information, he has to provide a larger public interest involved to come out of such exemption.