Y to this work. Correspondence and requests for materials should be addressed to J.L. (email: [email protected]) or L.S. (email: [email protected])received: 15 January 2016 accepted: 26 May 2016 Published: 16 JuneScientific RepoRts | 6:28033 | DOI: 10.1038/srepwww.nature.com/scientificreports/Figure 1. Procedure of the selection process.Since then, studies on ADs have been performed in several provinces of China. However, the results have been inconsistent. In Phillips’s study, the current prevalence of ADs in Shandong province was found to be 30.77, whereas in Zhejiang, it was 21.8617. In another study, conducted in Guangxi Zhuang Autonomous Region, both the current and lifetime prevalences of ADs were 1.2618 in 2007. Liu et al. conducted a study in Beijing in which the current and lifetime prevalences of ADs were found to be 31.59 and 59.54, respectively19. However, no epidemiological surveys on ADs at a national scale have been conducted in Doravirine manufacturer mainland China since 1993. To the best of our knowledge, no previous systematic reviews on ADs in mainland China have been conducted. Moreover, it was not until 2000 that Chinese research provided a clear definition of anxiety disorders20. Thus, we performed the first meta-analysis of ADs in mainland China (excluding Hong Kong, Taiwan, and Macao) from 2000 to 2015, with a particular interest in estimating the pooled prevalence of ADs, investigating whether significant get EPZ004777 differences existed in gender (males/females) and location (urban/rural) and observing the differences by time and geographical distribution.Search results. A total of 2537 studies were initially retrieved using the search format described in the Materials and Methods section. However, 591 studies were excluded because of duplication between databases. Then, 1946 studies were selected for initial identification. Of these, 1644 studies were excluded because they focused on the treatment of mental disorders, the disability rate of mental disorders or the management of patients with mental disorders or others, which were clearly not related to the prevalence of anxiety disorders. The remaining 302 studies were further studied by carefully reading the full text. After the full text review, 281 studies were excluded for the following reasons: i) they did not provide data for prevalence calculation (n = 2); ii) they did not perform random sampling (n = 1); iii) they were conducted at the county (n = 4) or village level (n = 1); iv) they were conducted before 2000 (n = 10); v) for diagnostic tools, they did not use structured diagnostic interviews with international diagnostic criteria, such as the Composite International Diagnostic Interview (CIDI), the Structured Clinical Interview for the DSM-IV (SCID) or the Anxiety Disorder Interview Schedule (ADIS) (n = 2); vi) the data duplicated those of other included studies (n = 49); vii) they were based on specific populations, regions or situations (n = 198) or viii) they were reviews (n = 14). Ultimately, 21 studies17?9,21?8 were selected for this meta-analysis. Figure 1 illustrates the detailed search process.ResultsScientific RepoRts | 6:28033 | DOI: 10.1038/srepwww.nature.com/scientificreports/ Study characteristics and assessment of study quality. As mentioned above, 21 studies were included in this meta-analysis. The years that these studies were conducted ranged from 2001 to 2012, and they covered 11 provinces (Fujian, Gansu, Guangdong, Hebei, Henan, Liaoning, Qinghai, Shandong, Yun.Y to this work. Correspondence and requests for materials should be addressed to J.L. (email: [email protected]) or L.S. (email: [email protected])received: 15 January 2016 accepted: 26 May 2016 Published: 16 JuneScientific RepoRts | 6:28033 | DOI: 10.1038/srepwww.nature.com/scientificreports/Figure 1. Procedure of the selection process.Since then, studies on ADs have been performed in several provinces of China. However, the results have been inconsistent. In Phillips’s study, the current prevalence of ADs in Shandong province was found to be 30.77, whereas in Zhejiang, it was 21.8617. In another study, conducted in Guangxi Zhuang Autonomous Region, both the current and lifetime prevalences of ADs were 1.2618 in 2007. Liu et al. conducted a study in Beijing in which the current and lifetime prevalences of ADs were found to be 31.59 and 59.54, respectively19. However, no epidemiological surveys on ADs at a national scale have been conducted in mainland China since 1993. To the best of our knowledge, no previous systematic reviews on ADs in mainland China have been conducted. Moreover, it was not until 2000 that Chinese research provided a clear definition of anxiety disorders20. Thus, we performed the first meta-analysis of ADs in mainland China (excluding Hong Kong, Taiwan, and Macao) from 2000 to 2015, with a particular interest in estimating the pooled prevalence of ADs, investigating whether significant differences existed in gender (males/females) and location (urban/rural) and observing the differences by time and geographical distribution.Search results. A total of 2537 studies were initially retrieved using the search format described in the Materials and Methods section. However, 591 studies were excluded because of duplication between databases. Then, 1946 studies were selected for initial identification. Of these, 1644 studies were excluded because they focused on the treatment of mental disorders, the disability rate of mental disorders or the management of patients with mental disorders or others, which were clearly not related to the prevalence of anxiety disorders. The remaining 302 studies were further studied by carefully reading the full text. After the full text review, 281 studies were excluded for the following reasons: i) they did not provide data for prevalence calculation (n = 2); ii) they did not perform random sampling (n = 1); iii) they were conducted at the county (n = 4) or village level (n = 1); iv) they were conducted before 2000 (n = 10); v) for diagnostic tools, they did not use structured diagnostic interviews with international diagnostic criteria, such as the Composite International Diagnostic Interview (CIDI), the Structured Clinical Interview for the DSM-IV (SCID) or the Anxiety Disorder Interview Schedule (ADIS) (n = 2); vi) the data duplicated those of other included studies (n = 49); vii) they were based on specific populations, regions or situations (n = 198) or viii) they were reviews (n = 14). Ultimately, 21 studies17?9,21?8 were selected for this meta-analysis. Figure 1 illustrates the detailed search process.ResultsScientific RepoRts | 6:28033 | DOI: 10.1038/srepwww.nature.com/scientificreports/ Study characteristics and assessment of study quality. As mentioned above, 21 studies were included in this meta-analysis. The years that these studies were conducted ranged from 2001 to 2012, and they covered 11 provinces (Fujian, Gansu, Guangdong, Hebei, Henan, Liaoning, Qinghai, Shandong, Yun.
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