Retrospective analysis of cases consulted at the department of psychiatry in a general hospital in Guangzhou, China

Objective: To comprehensively analyze cases of psychiatric consultation in a general hospital and provide a primary reference for the development of consultationliaison psychiatry. Method: A retrospective study was conducted by analyzing data collected over a two-year period regarding psychiatric consultations from the inpatient registry in a general hospital. Results: A total of 926 and 774 psychiatric consultations were recorded in 2016 and 2017, respectively. The most common reason for consultation was unexplained somatic symptoms. Consultations based on psychological evaluation, and mental/behavioral disorders due to organic diseases and perioperative stress were signifi cantly higher in 2017 than those in 2016 (P<0.01). Diagnoses of neurotic, stress-related and somatoform disorders were signifi cantly lower in 2017 compared to those in 2016 (269 [34.8%] cases in 2017 vs. 373 [40.3%] cases in 2016; P=0.019). Among specifi c diagnoses, generalized anxiety disorder was the most common. Conclusion: Most patients with depressive or anxiety disorders visit a general hospital due to somatic symptoms. It is necessary to train non-psychiatrists to identify mental disorders effi ciently, as well as to extend the comprehensive consultation model to include more clinical departments. Research Article Retrospective analysis of cases consulted at the department of psychiatry in a general hospital in Guangzhou, China Zhang LL1* and Zhao JP2 1Department of Psychiatry, Guangzhou First People’s Hospital, South China University of Technology, Guangzhou, Guangdong, China 2Department of Psychiatry and Mental Health Institute of the Second Xiangya Hospital, Central South University, Chinese National Clinical Research Center on Mental Disorders, Chinese National Technology Institute on Mental Disorders Hunan Key Laboratory of Psychiatry and Mental Health, Changsha, Hunan, China Received: 30 April, 2021 Accepted: 18 May, 2021 Published: 19 May, 2021 *Corresponding author: Zhang LL, Department of Psychiatry, Guangzhou First People’s Hospital, the Second Affi liated Hospital of South China University of Technology, 1 Panfu Road, Guangzhou, Guangdong, China, Tel: +86 2081046473; E-mail:


Introduction
Mental health problem is a serious issue among medically ill patients in general hospitals. Patients with mental disorder comorbidities show increased morbidity and mortality. If these comorbidities are not recognized and treated, they not only lead to an increased risk of multiple hospital visits and prolonged hospital stay, but also to higher medical expenses and ineffective treatment [1][2][3] and 2015, and reported that anxiety disorders were the most common class of disorders among subjects both in the twelve months preceding the interviews, and in their lifetime [4].
Approximately 50% of the patients with a major depressive disorder or anxiety disorder prefer to visit a general hospital for the fi rst consultation. Furthermore, more than 80% of those patients complaint only about somatic symptoms [5]. Patients with chronic psychical illness, or those in the perioperative period, have increased risks of comorbidities such as anxiety or depression [6][7][8]. Psychiatric consultation-liaison services play an important role in the diagnosis and treatment of mental comorbidities and psychological burdens in patients [9]. However, this model cannot be implemented for all patients with mental health concerns because of the high prevalence of mental comorbidities.
Moreover, the inability to identify cases of mental disorders, or misdiagnose them, in non-psychiatry departments is common, and eventually results in treatment delay and waste of medical resources [10]. Pezzia, et al. reported that evaluation of a known concern (such as substance use, affective disorder, or suicidal ideation) was the most common reason for psychiatric referral (41.7%) in inpatient medical teams [11]. Currently, there are few reports regarding intra-hospital consultation of cases to psychiatry departments in general hospitals in China, and data regarding the working conditions in these departments are also insuffi cient. We examined all cases of consultations to psychiatrists in a tertiary referral hospital between 2016 and 2017, with the aim of classifying them using different criteria and providing a primary reference for the development of Consultation-Liaison Psychiatry (CLP) in China.

Ethics
The study protocol was approved by the ethics committee of Guangzhou First People's Hospital. All patients provided written informed consent for their participation.

Study design and participation
Intra-hospital consultation was defi ned as a clinical department or medico-technical department (henceforth referred to as "principal department") consulting a psychiatrist or the psychiatry department within the same hospital (henceforth referred to as "consultant psychiatrist") to provide guidance regarding diagnosis and treatment of psychiatric disorders within the scope of their practice. Consultations that were accepted within 24 hours were considered in the study. Cases where the consultant psychiatrist arrived by the bed of the patient within 10 minutes of referral were classifi ed as urgent consultations. Special cases were those that were referred directly to the chief of the psychiatry department for guidance.
We carried out this retrospective study by extracting information from the inpatient registry. New cases referred to the department of psychiatry in our hospital between 1 January 2016 and 31 December 2017 were included in the study.
All consultation cases were registered in the patient record system. Repeated consultations for the same patient were not included in the study. Thus, we counted the total number of new consultation cases instead of the total number of visits to the department of psychiatry.

Statistical analysis
All statistical analyses were conducted using IBM SPSS software, version 22.0 (IBM Corp., Armonk, N.Y., USA). Twotailed statistical tests were conducted, with a P value <0.05 considered as statistically signifi cant. Continuous variables were described using summary statistics such as mean ± Standard Deviation (SD), and their normality was assessed by the Shapiro-Wilk normality test. Categorical variables were described using frequencies and percentages. Data were compared using the t-test or  2 test as appropriate.

Distribution of "principal department"
A total of 31 clinical departments had referred cases to the department of psychiatry for a consultation. Among these, the three "principal departments" which made the maximum number of referrals were the department of neurology (291 [31.4%]

Discussion
Substantial developments in the biopsychosocial-medical model have enabled improvements in the identifi cation of mental diseases by non-psychiatrists. In addition, due to recent developments, particularly the increased use of new medical technology and psychiatric medications over the past decade, CLP has become an important part of psychiatry [12].
Although there have been some articles on CLP, our study is the fi rst report in Guangzhou which focuses on the analysis of the changes in psychiatric consultation during the two years in a general hospital, with the aim to provide a primary reference for the development of consultation-liaison psychiatry. We found that somatic symptoms were the primary reason for patients with depressive disorder or anxiety disorder when visiting in a general hospital, which suggested that the ability of non-psychiatrist in general hospital to early identify mental disorders should be strengthened.  [17]. In terms of the distribution of cases among "principal departments," non-surgical departments had the highest frequency, which was in line with previous reports from China [18,19]. The department of neurology made the highest number of consultations, accounting for close to one third of the cases in the two year-period of our study. This result was consistent with fi ndings of other studies, suggesting that neurological diseases are strongly associated with mental disorders [20][21][22].

Reasons for psychiatric consultation
The most common reason for consultation was unexplained There was an increased need for psychological assessment in non-psychiatry departments, while the consultation of cases with a history of mental disorders had decreased signifi cantly.
Due to the improved ability of non-psychiatrists to accurately assess depression and anxiety in patients, and the use of psychotropic drugs by non-psychiatrists to treat them, the number of patients requiring psychiatric consultation had

Psychia tric consultation diagnosis
If we consider the diagnosis, there were 585 and 374 cases diagnosed as generalized anxiety disorder or depression in 2016 and 2017, respectively. Together, they accounted for 56.41% of the total number of consultations. These results were consistent with those reported previously, both in China and worldwide, which indicates that somatic symptoms were the primary reason for a hospital visit among most of the patients with depressive disorder or anxiety disorder [10,23,24]. Recently, it has been observed that mild, rather than severe, mental disorder has become the most common type of psychiatric disease diagnosed upon consultation in general hospitals. In addition to the high rate of incidence of depressive or anxiety disorders, and the probability of those being comorbidities with physical disorders, our study also demonstrated that greater attention is being paid to psychological factors. This was not limited only to severe mental disorders, but was also observed for mild mental disorders [10,19,23,25,26].
Most of inpatients who had mental disorders in general hospitals were underdiagnosed. This means that without systematic screening by psychiatrists, the mental healthcare needs of many patients could go unmet, or scarce resources could be misallocated. Along with developments in CLP in the past decade, psychiatric consultations in general hospitals have also increased. Possible reasons for this could be: 1. increased knowledge and awareness regarding mental illness among non-psychiatrists, which has increased the rate of identifi cation of mental illness; 2. the stressful nature of the job and patient-physician relationship, which encourages physicians practicing strictly within the scope allowed under law to seek professional help for looking after their own mental health; 3. intense social competition resulting in increased stress that has led to a rise in the rate of incidence of mental disorders. Moreover, due to an aging population, there is an increase in cases of neurological and mental disorders due to cardiovascular and cerebrovascular diseases, senile dementia, and metabolic disorders; 4. due to the stigma associated with mental disorders, patients often refuse to visit a psychiatrist, but prefer to visit a general physician instead for somatic symptoms or follow-up of previously treated physical disorders. Thus, in order to decrease the rate of underdiagnoses or misdiagnoses of mental disorders, it is important to train clinicians in nonpsychiatry departments to identify and treat mental disorders, especially by recognizing the somatic manifestations of mental disorders. Moreover, multidisciplinary teams (MDTs) are effective in strengthening cooperation between psychiatric and non-psychiatric departments [27,28]. Hong, et al. compared the effects of different modes of liaison psychiatric service and found that a combination of comprehensive assessment, psychiatric consultation and interdisciplinary teamwork was very effi cient in reducing the duration of hospital stay and medical expenses [29]. This proactive and comprehensive consultation model is worthy of being promoted in general hospitals in order to improve the diagnostic accuracy of nonpsychiatric doctors and encourage patient compliance with recommendations of psychiatric consultation [30,31].

Limitat ions
Our study was subject to a few limitations. First, consultation diagnosis was based on a clinical interview by psychiatrists without using a structured clinical interview questionnaire.
Second, consultation data retrieved from one of the hospitals had certain geographical limitations. Third, our study did not account for follow-ups and recovery rates, and did not evaluate the risk of patient suicide. Continuation of CLP services will benefi t the overall wellbeing of patients [32]. Although a preliminary analysis of all consultations was conducted in the study, we did not focus on a particular disorder. Future studies that focus on the progression of a specifi c physical disease with depressive or anxiety comorbidities and explore the impact of mental illness on the outcome of the physical disease are required. Fourth, our study analyzed the two-year CLP data in 2016 and 2017, which may not refl ect suffi cient outcome.
We plan to conduct further follow-up of CLP, such as detailed analysis of consultation data within 5 years.

Conclusion
We found that there was a considerable need for consultations with the psychiatry department in the general hospital. The primary reason for psychiatric consultations was unexplained somatic symptoms that are clinical manifestations of depressive or anxiety disorders. It is important to encourage psychiatric consultation, and train clinicians from nonpsychiatry departments to identify somatic manifestations of mental disorders with greater effi ciency, as well as to extend psychiatric services to tertiary healthcare centers and other healthcare services.

Funding
This study was supported by grants from the Science and