Many homeless adults have physical and other types of disabilities. Almost half (46 percent) reported chronic physical conditions. Problems with alcohol, drugs, and mental health among homeless people are well documented and often occur together. Among adults using homeless services, 31 percent reported a combination of mental health and substance abuse problems (alcohol and/or drugs). An additional 17 percent reported problems with drugs and/or alcohol problems, but no mental health problems. Further, 12 percent reported only problems with alcohol, and 15 percent reported only mental health problems. Only one in four homeless adults did not report any mental health or substance abuse problems.