Psychopathology and extrapyramidal side effects in smoking and non-smoking patients with schizophrenia: Systematic review and meta-analysis of comparative studies. 2019

Hui Huang, and Min Dong, and Ling Zhang, and Bao-Liang Zhong, and Chee H Ng, and Gabor S Ungvari, and Zhen Yuan, and Xiangfei Meng, and Yu-Tao Xiang
Affiliated Wuhan Mental Health Center, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.

The association between smoking and psychopathology and extrapyramidal side effects (EPSE) in schizophrenia has been controversial. This systematic review and meta-analysis compared psychopathology and EPSE between smoking and non-smoking schizophrenia patients. The PubMed, EMBASE, PsycINFO, Cochrane Library, and Web of Science databases were independently and systematically searched by two researchers to identify relevant articles. Standardized mean differences (SMDs) and their 95% confidence intervals (CI) were calculated with random effect models. Subgroup and meta-regression analyses were performed to explore sources of heterogeneity. The systematic review and meta-analysis included 29 studies that compared psychotic, depressive and anxiety symptoms and EPSE between smoking (n = 3591) and non-smoking schizophrenia patients (n = 2980). Smoking patients had significantly more severe positive symptoms (24 studies; SMD = 0.33, 95% CI: 0.16 to 0.50, P < 0.001), but less severe EPSE (7 studies; SMD = -0.20, 95% CI: -0.38 to -0.02, P = 0. 03). No significant group differences in negative, depressive and anxiety symptoms were found. In conclusion, this systematic review and meta-analysis found that smoking schizophrenia patients had more severe positive symptoms but less severe EPSE than non-smoking patients.

UI MeSH Term Description Entries
D011618 Psychotic Disorders Disorders in which there is a loss of ego boundaries or a gross impairment in reality testing with delusions or prominent hallucinations. (From DSM-IV, 1994) Psychoses,Psychosis, Brief Reactive,Schizoaffective Disorder,Schizophreniform Disorders,Psychosis,Brief Reactive Psychoses,Brief Reactive Psychosis,Disorder, Psychotic,Disorder, Schizoaffective,Disorder, Schizophreniform,Disorders, Psychotic,Disorders, Schizoaffective,Disorders, Schizophreniform,Psychoses, Brief Reactive,Psychotic Disorder,Reactive Psychoses, Brief,Reactive Psychosis, Brief,Schizoaffective Disorders,Schizophreniform Disorder
D003863 Depression Depressive states usually of moderate intensity in contrast with MAJOR DEPRESSIVE DISORDER present in neurotic and psychotic disorders. Depressive Symptoms,Emotional Depression,Depression, Emotional,Depressive Symptom,Symptom, Depressive
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D001007 Anxiety Feelings or emotions of dread, apprehension, and impending disaster but not disabling as with ANXIETY DISORDERS. Angst,Anxiousness,Hypervigilance,Nervousness,Social Anxiety,Anxieties, Social,Anxiety, Social,Social Anxieties
D001480 Basal Ganglia Diseases Diseases of the BASAL GANGLIA including the PUTAMEN; GLOBUS PALLIDUS; claustrum; AMYGDALA; and CAUDATE NUCLEUS. DYSKINESIAS (most notably involuntary movements and alterations of the rate of movement) represent the primary clinical manifestations of these disorders. Common etiologies include CEREBROVASCULAR DISORDERS; NEURODEGENERATIVE DISEASES; and CRANIOCEREBRAL TRAUMA. Extrapyramidal Disorders,Basal Ganglia Disorders,Lenticulostriate Disorders,Basal Ganglia Disease,Basal Ganglia Disorder,Extrapyramidal Disorder,Lenticulostriate Disorder
D012559 Schizophrenia A severe emotional disorder of psychotic depth characteristically marked by a retreat from reality with delusion formation, HALLUCINATIONS, emotional disharmony, and regressive behavior. Dementia Praecox,Schizophrenic Disorders,Disorder, Schizophrenic,Disorders, Schizophrenic,Schizophrenias,Schizophrenic Disorder
D012907 Smoking Willful or deliberate act of inhaling and exhaling SMOKE from burning substances or agents held by hand. Smoking Behaviors,Smoking Habit,Behavior, Smoking,Behaviors, Smoking,Habit, Smoking,Habits, Smoking,Smoking Behavior,Smoking Habits
D014150 Antipsychotic Agents Agents that control agitated psychotic behavior, alleviate acute psychotic states, reduce psychotic symptoms, and exert a quieting effect. They are used in SCHIZOPHRENIA; senile dementia; transient psychosis following surgery; or MYOCARDIAL INFARCTION; etc. These drugs are often referred to as neuroleptics alluding to the tendency to produce neurological side effects, but not all antipsychotics are likely to produce such effects. Many of these drugs may also be effective against nausea, emesis, and pruritus. Antipsychotic,Antipsychotic Agent,Antipsychotic Drug,Antipsychotic Medication,Major Tranquilizer,Neuroleptic,Neuroleptic Agent,Neuroleptic Drug,Neuroleptics,Tranquilizing Agents, Major,Antipsychotic Drugs,Antipsychotic Effect,Antipsychotic Effects,Antipsychotics,Major Tranquilizers,Neuroleptic Agents,Neuroleptic Drugs,Tranquillizing Agents, Major,Agent, Antipsychotic,Agent, Neuroleptic,Drug, Antipsychotic,Drug, Neuroleptic,Effect, Antipsychotic,Major Tranquilizing Agents,Major Tranquillizing Agents,Medication, Antipsychotic,Tranquilizer, Major
D015897 Comorbidity The presence of co-existing or additional diseases with reference to an initial diagnosis or with reference to the index condition that is the subject of study. Comorbidity may affect the ability of affected individuals to function and also their survival; it may be used as a prognostic indicator for length of hospital stay, cost factors, and outcome or survival.

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