Our goal was to identify the demographic profile of the people living homeless with mental illness in Lisboa, Portugal, and their relationship with the national healthcare system. We also tried to understand which factors contribute to the number and duration of psychiatric admissions among these homeless people.

We used a cross-sectional design, collecting data for 4 years among homeless people, in Lisboa, Portugal, that were referred as possible psychiatric patients to Centro Hospitalar Psiquiátrico de Lisboa (CHPL). In total, we collected data from 500 homeless people, then cross-checked these people in our CHPL hospital electronic database and obtained 467 patient matches.

The most common psychiatric diagnosis in our sample was drug abuse (34%), followed by alcohol abuse (33%), personality disorder (24%), and acute stress reaction (23%). Sixty-two percent of our patients had multiple diagnoses, a subgroup with longer follow-ups, more psychiatric hospitalizations, and longer psychiatric hospitalizations. The prevalence of psychotic disorders was high: organic psychosis (17%), schizophrenia (15%), psychosis not otherwise specified (14%), and schizoaffective disorder (11%), that combined altogether were present in more than half (57%) of our homeless patients.

The people living homeless with multiple diagnoses have higher mental health needs and worse determinants of general health. An ongoing effort is needed to identify and address this subgroup of homeless people with mental illness to improve their treatment and outcomes.

我们的目标是确定葡萄牙里斯本患有精神疾病的无家可归者的人口统计概况，以及他们与国家医疗保健系统的关系。我们还试图了解哪些因素会影响这些无家可归者接受精神病治疗的人数和持续时间。

我们使用横断面设计，在葡萄牙里斯本的无家可归者中收集了 4 年的数据，这些人可能是精神病患者，被转介到Centro Hospitarar Psiquiátrico de Lisboa (CHPL)。我们总共收集了 500 名无家可归者的数据，然后在我们的 CHPL 医院电子数据库中对这些人进行了交叉检查，并获得了 467 名患者匹配。

在我们的样本中，最常见的精神病学诊断是药物滥用 (34%)，其次是酒精滥用 (33%)、人格障碍 (24%) 和急性应激反应 (23%)。我们 62% 的患者有多重诊断，一个亚组的随访时间更长，精神病住院时间更长，精神病住院时间更长。精神障碍的患病率很高：器质性精神病 (17%)、精神分裂症 (15%)、未另行说明的精神病 (14%) 和分裂情感障碍 (11%)，加起来占一半以上 (57%) ) 我们无家可归的病人。

患有多重诊断的无家可归者有更高的心理健康需求和更差的总体健康决定因素。需要不断努力来识别和解决这个患有精神疾病的无家可归者亚群，以改善他们的治疗和结果。