Category: Statistics

J Evid Based Med. 2023 Dec 18. doi: 10.1111/jebm.12576. Online ahead of print.

ABSTRACT

OBJECTIVE: Observational studies had demonstrated a link between sleep disturbances and cognitive decline. Here, we aimed to investigate the causal association between genetically predicted sleep traits and cognitive impairment using Mendelian randomization (MR).

METHODS: Using strict criteria, we selected genetic variants from European ancestry Genome-wide association studies (GWAS) from the Sleep Disorders Knowledge Portal and UK Biobank as instrumental variables for several sleep traits, including insomnia, sleep duration, daytime sleepiness, daytime napping, and chronotype. Summary statistics related to cognitive impairment were derived from five different GWAS, including the Social Science Genetic Association Consortium. The role of self-reported sleep trait phenotypes in the etiology of cognitive impairment was explored using inverse-variance weighted (IVW) tests, MR-Egger tests, and weighted medians, and sensitivity analyses were conducted to ensure robustness.

RESULTS: In the main IVW analysis, sleep duration (reaction time: β = -0.05, 95% CI -0.07 to -0.04, p = 1.93×10^-12 ), daytime sleepiness (average cortical thickness: β = -0.12, 95% CI -0.22 to -0.02, p = 0.023), and daytime napping (fluid intelligence: β = -0.47, 95% CI -0.87 to -0.07, p = 0.021; hippocampal volume in Alzheimer’s disease: β = -0.99, 95% CI -1.64 to -0.35, p = 0.002) were significantly negatively correlated with cognitive performance. However, any effects of insomnia and chronotype on cognitive impairment were not determined.

CONCLUSIONS: Our findings highlighted that focusing on sleep behaviors or distinct sleep patterns-particularly sleep duration, daytime sleepiness, and daytime napping, was a promising approach for preventing cognitive impairment. This study also shed light on risk factors for and potential early markers of cognitive impairment risk factors.

PMID:38108111 | DOI:10.1111/jebm.12576

Indian J Psychiatry. 2023 Oct;65(10):1061-1068. doi: 10.4103/indianjpsychiatry.indianjpsychiatry_393_23. Epub 2023 Oct 16.

ABSTRACT

BACKGROUND AND AIMS: In India, the awareness about the psycho-social dimension of chronic pain is minimal among physicians and patients. The research with community-based group therapies (like mindfulness) to address the psycho-social aspects in chronic pain patients remains limited. The aim of this randomized controlled trial was to see the effects of mindfulness on pain intensity, pain catastrophizing, chronic pain acceptance, perceived stress, well-being, and mindfulness characteristics.

MATERIALS AND METHODS: In this two-site, parallel group, clinical trial, 170 patients attending pain outdoors of two government hospitals in West Bengal, India, were randomized to attend five weekly in-person mindfulness sessions (cases) or usual care sessions (controls) within the hospital premises. Pre-program and post-program data were collected and analyzed using statistical methods like repeated measures analysis of variance.

RESULTS: In participants of the mindfulness group, significant changes post session were noted in pain intensity [F(1,326) = 15.0122; P = 0.0001291], pain acceptance [F(1,326) = 4.5311; P = 0.03403], and perceived stress score [F(1,326) = 13.2788; P = 0.0003122] compared to pre-session. The changes in pain catastrophizing, World Health Organization well-being and Freiburg mindfulness inventory scores were non-specific.

CONCLUSION: Mindfulness had a positive influence on pain intensity, pain acceptance, and perceived stress of Indian chronic pain patients. The effects on pain catastrophizing, mindfulness characteristics, and well-being (non-specific) were also encouraging. Further studies will be required to substantiate these results.

PMID:38108060 | PMC:PMC10725204 | DOI:10.4103/indianjpsychiatry.indianjpsychiatry_393_23

Indian J Psychiatry. 2023 Oct;65(10):1069-1077. doi: 10.4103/indianjpsychiatry.indianjpsychiatry_439_23. Epub 2023 Oct 16.

ABSTRACT

CONTEXT: Recent systematic review and meta-analysis of public attitudes have shown that despite improvements in mental health literacy, public attitudes and desire for social distance with mental illnesses have remained stable over time.

AIMS: To assess the awareness and attitude of the rural community towards mental disorders using the CAMI scale.

MATERIALS AND METHODS: This mixed method study was conducted under the ICMR-STS grant scheme after IEC approval. It included administration of a pre-tested questionnaire adapted from CAMI scale on 196 adults aged 18-60 years from an adopted village in the field practice area of medical college along with 8 in-depth interviews of key people in the same community. Thematic analysis was done for the qualitative part whereas for the quantitative part, Pearson’s correlation coefficient, independent t-test, ANOVA and Kruskall-wallis test were used.

RESULTS: Age was positively correlated with the attitude of authoritarianism, social restrictiveness, CMHI and showed a negative correlation with attitude of benevolence. Females showed higher scores for authoritarianism and social restrictiveness. There was a statistically significant difference between APL and BPL groups for authoritarianism attitude towards the mentally ill (P value = 0.02) and CMHI (P value = 0.033). It was observed that with increase in the education levels there was a rise in the mean score of the values for the attitude of benevolence but the difference wasn’t statistically significant (P > 0.05). Thematic analysis of the key informant interviews suggested various perceptions of the community regarding mental illness, available options for management, current practices of the community and what can be done further to improve facilities for mental health.

CONCLUSIONS: People in the community have a varied perspective to mental illnesses which has changed for the better over time but community still approaches quacks first which warrants the need for more awareness. For this, feasibility and effectiveness of increasing involvement of females from the community in health-related decisions can be explored further. We recommend further awareness generation in the younger generation with community-based research on perceptions of the community about mental health. This will provide more practical and feasible solutions to complement the national mental health program.

PMID:38108054 | PMC:PMC10725215 | DOI:10.4103/indianjpsychiatry.indianjpsychiatry_439_23

Indian J Psychiatry. 2023 Oct;65(10):1044-1051. doi: 10.4103/indianjpsychiatry.indianjpsychiatry_303_23. Epub 2023 Oct 16.

ABSTRACT

BACKGROUND: Schizophrenia causes significant neurocognitive impairment. Treatment with antipsychotics leads to improvement in psychopathology and neurocognitive functions.

AIM: To see comparative effectiveness of aripiprazole and olanzapine on neurocognitive profile of patients with schizophrenia.

MATERIALS AND METHODS: This was a comparative, prospective, and interventional study. Patients with schizophrenia as per the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5), were assessed on Brief Psychiatric Rating Scale (BPRS), Positive and Negative Syndrome Scale (PANSS), and neuropsychological tests at baseline. Patients were randomly assigned to aripiprazole (10-30 mg per day, orally) and olanzapine (5-20 mg per day, orally) groups on the basis of computer-generated random table number. Patients were reassessed at 10 weeks.

RESULTS: A total of 40 patients completed the study duration of 10 weeks. At baseline, the majority of patients showed significant impairment in one or more domains of neurocognition. Both aripiprazole and olanzapine led to improvement in psychiatric symptoms as well as neurocognitive profile. Aripiprazole treatment leads to significant improvement in mental speed as compared to olanzapine. A highly significant decrease in the value of the Stroop effect indicates improvement (P = 0.000**) with aripiprazole and visual-spatial constructive ability (P < 0.001). The olanzapine group showed highly significant improvement in performance of category fluency (P < 0.01) and verbal fluency (P < 0.01).

CONCLUSION: The study concludes that aripiprazole and olanzapine have strong potential to improve specific domains of neurocognitive profile.

PMID:38108052 | PMC:PMC10725211 | DOI:10.4103/indianjpsychiatry.indianjpsychiatry_303_23

Indian J Psychiatry. 2023 Oct;65(10):1052-1060. doi: 10.4103/indianjpsychiatry.indianjpsychiatry_577_23. Epub 2023 Oct 16.

ABSTRACT

CONTEXT: The Big Five model is a well-accepted model of personality but there is scant research on the factor structure of personality from Asian populations. It is unclear whether the Big Five personality model can account for cross-cultural variation in personality structures.

AIM: To explore the factor structure of personality by analyzing the Big Five personality factors in a sample from Karnataka, South India.

SETTINGS AND DESIGN: This was a cross-structural observational study conducted in Udupi and Mangalore.

METHODS AND MATERIAL: 400 community participants (200 women) from diverse socio economic backgrounds were recruited for the study and were assessed on either an English or Kannada version of the BFI-2-S. The reliability of the translated version of BFI-2-S was established.

STATISTICAL ANALYSIS USED: Exploratory factor analysis using Principal Component Analysis with Varimax Rotation and Kaiser Normalization was carried out.

RESULTS: Factor Analysis revealed a four-factor and a five-factor solution that varied distinctly from the original Big Five. None of the identified factors fit into the original five factors. The four-factor solution explained 36.86% of the variance and the five-factor solution explained 41.74%. The five factors were named as – Social Effectiveness, Interpersonal Ability, Altruism, Emotional Instability, and Innovativeness. The translated tool showed good temporal stability.

CONCLUSIONS: The Five factors identified in the present study differ from the Big Five model or the General Factor of Personality. This raises questions about the cross-cultural validity of the Big Five model as well as highlighting the need to adopt more culturally adaptive methods of assessing personality.

PMID:38108050 | PMC:PMC10725210 | DOI:10.4103/indianjpsychiatry.indianjpsychiatry_577_23

Interv Neuroradiol. 2023 Dec 17:15910199231219823. doi: 10.1177/15910199231219823. Online ahead of print.

ABSTRACT

BACKGROUND: Cervicofacial arteriovenous malformations (AVMs) are a significant source of morbidity. Endovascular embolization has emerged as a promising treatment technique for these lesions. However, current literature on cervicofacial AVM embolization mostly consists of single-agent oriented case series, and to date, no comprehensive study has compared the outcomes of available embolic agents.

PURPOSE: To investigate the performance of different embolic agents in the management of cervicofacial AVMs.

METHODS: We systematically searched Ovid MEDLINE, Ovid EMBASE, Ovid Cochrane Central Register of Controlled Trials Scopus, and Web of Science. Studies providing data for the endovascular treatment of cervicofacial AVMs were included. The data regarding complication and cure rates were collected for each embolic agent. Pooled event rates were presented as descriptive statistics.

RESULTS: Eleven studies comprising 204 patients were included in the review. The overall complete and partial cure rates were 62.2% (127/204) and 36.2% (74/204), respectively. Embolization failed to achieve significant improvement in only 1.6% (3/204) of the patients. The complete cure rates were 87.5% (75-100%) for n-Butyl cyanoacrylate (NBCA, glue), 80.5% (61-100%) for Onyx (Medtronic, MN, USA), and 51.5% (18-85%) for ethanol. The overall complication rate was 30% (61/204). The complication rates were 33% (12.5-53%) for ethanol, 14% (0-28%) for Onyx, and 0% for NBCA.

CONCLUSIONS: Our systematic review supports that endovascular embolization is an effective treatment option for cervicofacial AVMs. In our review, the use of Onyx and NBCA was associated with consistently high complete cure rates and a promising safety profile. However, more research is needed to investigate the use of different embolic agents in the treatment of cervicofacial AVMs.

PMID:38105437 | DOI:10.1177/15910199231219823

Mol Neurobiol. 2023 Dec 18. doi: 10.1007/s12035-023-03822-w. Online ahead of print.

ABSTRACT

Both neurofibrillary tangles and senile plaques are associated with inflammation in Alzheimer’s disease (AD). Their relative degree of induced neuroinflammation, however, is not well established. Mouse models of AD that expressed either human Aβ42 (n = 7) or human hyperphosphorylated tau protein alone (n = 3), wild type (n = 10), and human AD samples (n = 29 with 18 controls) were studied. The benefit of using mouse models that possess only human tau or amyloid-b is that it allows for the individual evaluation of how each protein affects neuroinflammation, something not possible in human tissue. Three indicators of neuroinflammation were examined: TLRs/RIG1 expression, the density of astrocytes and microglial cells, and well-established mediators of neuroinflammation (IL6, TNFα, IL1β, and CXCL10). There was a statistically significant increase in neuroinflammation with all three variables in the mouse models with human tau only as compared to human Aβ42 only or wild-type mice (each at p < 0.0001). Only the Aβ42 5xFAD mice (n = 4) showed statistically higher neuroinflammation versus wild type (p = 0.0030). The human AD tissues were segregated into Aβ42 only or hyperphosphorylated tau protein with Aβ42. The latter areas showed increased neuroinflammation with each of the three variables compared to the areas with only Aβ42. Of the TLRs and RIG-1, TLR8 was significantly elevated in both the mouse model and human AD and only in areas with the abnormal tau protein. It is concluded that although Aβ42 and hyperphosphorylated tau protein can each induce inflammation, the latter protein is associated with a much stronger neuroinflammatory response vis-a-vis a significantly greater activated microglial response.

PMID:38105410 | DOI:10.1007/s12035-023-03822-w

Addiction. 2023 Dec 17. doi: 10.1111/add.16400. Online ahead of print.

ABSTRACT

BACKGROUND AND AIMS: Standard approaches to smoking cessation may not be as effective for certain populations, and tailoring on cultural factors could improve their effectiveness. This systematic review measured the effectiveness of culturally tailoring smoking cessation interventions on quitting or reducing smoking combustible tobacco.

METHOD: We searched MEDLINE, PsychInfo, Embase and Cochrane Central Register from inception to 21 June 2023 for randomized controlled trials (RCTs) of community-based, primary care or web-based interventions for smoking cessation in adults who smoked tobacco, with measurement of smoking abstinence or reduction at least 3 months following baseline. We examined comparisons between either an intensity-matched culturally tailored intervention and a non-tailored intervention or a standard non-tailored intervention and the same intervention plus a culturally tailored adjunct. We sub-grouped studies according to the level of tailoring and performed subgroup analyses where appropriate. We assessed risk of bias and certainty of evidence.

RESULTS: We identified 43 studies, 33 of which were meta-analyzed (n = 12 346 participants). We found moderate certainty evidence, limited by heterogeneity, that intensity-matched culturally tailored cessation interventions increased quit success when compared with non-tailored interventions at 3-month follow-up or longer (n = 5602, risk ratio [RR] = 1.29 95% confidence interval [CI] 1.10, 1.51, I² = 47%, 14 studies). We found a positive effect of adding a culturally tailored component to a standard intervention compared with the standard intervention alone (n = 6674, RR = 1.47, 95% CI 1.10, 1.95, I² = 74%, 18 studies), but our certainty in this effect was low due to imprecision and substantial statistical heterogeneity.

CONCLUSION: Culturally tailored smoking cessation interventions may help more people to quit smoking than a non-tailored intervention. Adapting or adding cultural components to smoking cessation interventions originally developed for majority populations could improve cessation rates in populations who do not fully identify with majority cultural norms.

PMID:38105395 | DOI:10.1111/add.16400

Small Methods. 2023 Dec 17:e2300958. doi: 10.1002/smtd.202300958. Online ahead of print.

ABSTRACT

Nomex Honeycomb core is the foundational building block for manufacturing aerospace composite components. Its usage requires machining honeycomb in complex aerodynamic profiles where the quality of the core is governed by accuracy and precision of cut profiles. The assessment of accuracy and precision is directly related to forces induced in the cutting tool and cutting efficiency. These two parameters form the basis of a multi-objective function that this paper aims to optimize for the milling operation. The parameter of depth of cut considered in this paper has not been analyzed in a multi-objective optimization study of the Nomex Honeycomb core previously. A Taguchi-based array of Design of Experiments followed by Analysis of Variance and correlation analysis is utilised. The results indicate that the most significant factor is the feed rate, with a percentage contribution of 72% for the cutting forces and depth of cut, with a percentage contribution of 85% in the case of cutting efficiency. The two parameters are optimized using Desirability Function Analysis and Grey Relational Analysis. The results are validated through experimental runs with an error within 5% of the statistical predictions, with the percentage improvement in cutting forces for optimum runs as compared to the worst experimental run at 47.8%. The percentage improvement in cutting efficiency likewise is 11%.

PMID:38105388 | DOI:10.1002/smtd.202300958

Syst Parasitol. 2023 Dec 18;101(1):3. doi: 10.1007/s11230-023-10136-x.

ABSTRACT

Pseudoplatystoma punctifer is a catfish species that occupies the first place in the statistics of fishing landings in the region of Loreto, being of economic importance in the Peruvian Amazonia. As an initiative to know the parasites present in the gills of P. punctifer from the Peruvian Amazonia, a study was carried out with fish collected in the Belén Market, in Loreto-Peru. Specimens were provided between June and October 2018 from local fishermen from the Belén Market, in Loreto-Peru and samples were processed and analyzed in the “Laboratorio de Parasitología y Sanidad Acuícola” from the “Instituto de Investigaciones de la Amazonía Peruana” (IIAP) in Iquitos, Loreto-Peru. The analyzes of the gills revealed the presence of two new species of Monogenoidea: Demidospermus aureagarciae n. sp. and D. doncellae n. sp. These species are unique among congeners by the morphology of the copulatory complex and vagina. Demidospermus aureagarciae n. sp presents a male copulatory organ as a coiled tube, with a complete counterclockwise ring, with dilated base with a developed sclerotized margin, from which a flap projects; a concave accessory piece, with a tapered and curved distal part and a saculiform vaginal vestibule, connected to the vaginal canal. Demidospermus doncellae n. sp. presents a copulatory complex that is an elongated coiled tube, with approximately three clockwise rings, with dilated base with a developed sclerotized margin, from which a flap projects; an accessory piece sheath like, and a sclerotized vagina with dextral position, with saclike vaginal vestibule, connected to an elongated canal.

PMID:38105359 | DOI:10.1007/s11230-023-10136-x