ผลต่างระหว่างรุ่นของ "หน้าหลัก"
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− | + | Effects of other substances for example stimulants; it's normally complicated | |
+ | Effects of other substances including stimulants; it is actually often tough to control for things such as potency of cannabis, frequency of use, and level of cannabis consumed, on account of statistical power problems; and lastly and perhaps most importantly, most studies are unable to demonstrate temporal priority of cannabis in relation to early prodromal features of psychosis [the Dunedin study is among the handful of that have accomplished this methodologically (4, 5)]. These limitations are extremely relevant in attempting to establish a causal relationship among "CU" and "psychosis." This is since any attempt to establish"causation"must fulfill the following criteria as defined by Susser (6): association; temporal priority; and path (exactly where the last implies that modifications within the putative result in will actually cause adjustments within the outcome, and that the association between putative trigger and outcome will not derive from a third issue widespread to both) (5). Other criteria for causation listed by Hill (7) include: strength (i.e., a [https://www.medchemexpress.com/D-Glutamic-acid.html D-Glutamic acid medchemexpress] dose-response relationship); consistency; specificity; biological gradient; temporality; coherence; and plausibility (i.e., a plausible biological mechanism linking exposure and outcome). Thus the evidencebase on cannabis and psychosis should really at least satisfy the majority of these criteria, and have to meet the criterion of temporality which, according to Rothman and Greenland (8), will be the sine qua non-for causality (5). Numerous studies confirm that CU is around two times far more frequent amongst individuals with schizophrenia than in the common population (9, 10). Furthermore, CU is deemed a considerable risk factor for each suicide attempts and behavior in psychotic samples (11). This raises the query of regardless of whether cannabis plays an etiological function inside the onset of schizophrenia, or regardless of whether persons with schizophrenia are prone to elevated use of cannabis. Research of retrospective reports on CU usually show that roughly one third of individuals commence CU prior to onset of psychotic illness (12, 13). Retrospective studies are subject to recall bias; as a result prospective information is essential to confirm temporal priority (and hence causality) of CU. Many systematic critiques have focused on prospective research only with longitudinal styles andFrontiers in Psychiatry | Addictive Issues and Behavioral DyscontrolOctober 2013 | Volume 4 | Short article 128 |BurnsCannabis and psychosisthese report pooled odds ratios varying among 1.41 and two.34 (5, 14, 15). Henquet et al. (14), whose evaluation arrived at a pooled odds ratio of two.1, noted that this result held irrespective of no matter whether studies with narrow clinical outcome had been integrated (OR: two.4) or whether those with broader outcomes have been integrated (OR: 1.9). Interestingly, Arseneault et al. (5) who arrived at a pooled odds ratio of 2.34, integrated a really narrow definition of clinical outcomes; although Moore et al. (15), who arrived at a pooled odds ratio of 1.41 in their systematic critique, integrated an incredibly broad definition of psychotic outcomes. The impression for that reason from these systematic evaluations is that narrow definitions of psychosis (i.e., restricted to nonaffective psychosis/schizophrenia-spectrum) are connected with slightly greater odds ratios of around two.three?.four; whilst broader definitions are associated with slightly reduced odds ratios of about 1.4?.9. |
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Effects of other substances for example stimulants; it's normally complicated Effects of other substances including stimulants; it is actually often tough to control for things such as potency of cannabis, frequency of use, and level of cannabis consumed, on account of statistical power problems; and lastly and perhaps most importantly, most studies are unable to demonstrate temporal priority of cannabis in relation to early prodromal features of psychosis [the Dunedin study is among the handful of that have accomplished this methodologically (4, 5)]. These limitations are extremely relevant in attempting to establish a causal relationship among "CU" and "psychosis." This is since any attempt to establish"causation"must fulfill the following criteria as defined by Susser (6): association; temporal priority; and path (exactly where the last implies that modifications within the putative result in will actually cause adjustments within the outcome, and that the association between putative trigger and outcome will not derive from a third issue widespread to both) (5). Other criteria for causation listed by Hill (7) include: strength (i.e., a D-Glutamic acid medchemexpress dose-response relationship); consistency; specificity; biological gradient; temporality; coherence; and plausibility (i.e., a plausible biological mechanism linking exposure and outcome). Thus the evidencebase on cannabis and psychosis should really at least satisfy the majority of these criteria, and have to meet the criterion of temporality which, according to Rothman and Greenland (8), will be the sine qua non-for causality (5). Numerous studies confirm that CU is around two times far more frequent amongst individuals with schizophrenia than in the common population (9, 10). Furthermore, CU is deemed a considerable risk factor for each suicide attempts and behavior in psychotic samples (11). This raises the query of regardless of whether cannabis plays an etiological function inside the onset of schizophrenia, or regardless of whether persons with schizophrenia are prone to elevated use of cannabis. Research of retrospective reports on CU usually show that roughly one third of individuals commence CU prior to onset of psychotic illness (12, 13). Retrospective studies are subject to recall bias; as a result prospective information is essential to confirm temporal priority (and hence causality) of CU. Many systematic critiques have focused on prospective research only with longitudinal styles andFrontiers in Psychiatry | Addictive Issues and Behavioral DyscontrolOctober 2013 | Volume 4 | Short article 128 |BurnsCannabis and psychosisthese report pooled odds ratios varying among 1.41 and two.34 (5, 14, 15). Henquet et al. (14), whose evaluation arrived at a pooled odds ratio of two.1, noted that this result held irrespective of no matter whether studies with narrow clinical outcome had been integrated (OR: two.4) or whether those with broader outcomes have been integrated (OR: 1.9). Interestingly, Arseneault et al. (5) who arrived at a pooled odds ratio of 2.34, integrated a really narrow definition of clinical outcomes; although Moore et al. (15), who arrived at a pooled odds ratio of 1.41 in their systematic critique, integrated an incredibly broad definition of psychotic outcomes. The impression for that reason from these systematic evaluations is that narrow definitions of psychosis (i.e., restricted to nonaffective psychosis/schizophrenia-spectrum) are connected with slightly greater odds ratios of around two.three?.four; whilst broader definitions are associated with slightly reduced odds ratios of about 1.4?.9.