OPEN MINDS The Behavioral Health & Social Service Industry Analyst Industry News According to the 1988 National Association of Private Psychiatric Hospitals (NAPPH) Annual Survey, the average length of stay in private psychiatric hospitals declined from 33 days in 1986 to 30.85 days in 1988. Decline in length of stay was noted in all major age categories as follows: The survey also found that employers and employee assistance programs, while contributing a small share of total referrals to private psychiatric hospitals, have become a steadily growing source of . . .