Tag: statistics

J Clin Lab Anal. 2022 Sep 13:e24702. doi: 10.1002/jcla.24702. Online ahead of print.

ABSTRACT

BACKGROUND: COVID-19 is a newly discovered infectious disease that spread and caused a global health problem. Medical students, especially those in clinical stages are among groups exposed to the disease. The study aimed to show the impact of social distancing on the mental health of Iraqi medical students.

METHOD: A convenient sampling technique involved 105 participants was obtained through a questionnaire. The participants were from all stages of College Of Medicine. Questions were regarding the mental health status of the students, which included sleeping hours, nightmares, eating habits, weight problems, relationship with the family, starting to have bad habits, memory loss, attention problems, irritability, and study rank affect.

RESULTS: Of about 105 participants, 64 (60.9%) of them were females and 41 (39.1%) were males. The mean age of the participants was (21.26 ± 1.065) ranging from 19 to 24 years. Feeling stressful when hearing news about COVID-19″ found in 82 (78.1%) of the participants. A high statistical significant difference (p = 0.035) among feeling isolated. About 77 (73.3%) of the participants had become easily irritable and angry. About 82 (78.1%) student started for having calculation problems. The stress with sleeping hours (p = 0.019), sleeping disturbance (p = 0.022), eating habit (p = 0.015), weight problems (p = 0.002), fear of familiar places (p = 0.004), recent memory loss (p = 0.034) and being easily irritable or angry (p = 0.0001), revealed a statistical significant association, respectively.

CONCLUSION: COVID-19 news and social distancing had made medical students more stressed and irritable, affecting their sleeping hours and pattern with a general tendency for weight gain and recent memory loss in stressful students.

PMID:36097972 | DOI:10.1002/jcla.24702

Int J Dermatol. 2022 Sep 13. doi: 10.1111/ijd.16409. Online ahead of print.

ABSTRACT

BACKGROUND: Hidradenitis suppurativa (HS) is associated with substantial morbidity. Few studies have addressed the natural history and mortality rates associated with HS. A higher risk of cardiovascular death in patients with HS has been reported. We investigated whether patients with HS have an increased overall risk of death compared with age- and gender-matched referents.

METHODS: We performed a retrospective cohort study of residents of Olmsted County, Minnesota, with incident HS between January 1, 1980, and December 31, 2008, and age- and gender-matched referents. The main outcomes and measures were the overall and cause-specific risks of death.

RESULTS: We identified 226 incident cases of HS and 678 age- and gender-matched referents among Olmsted County residents during the study period. Compared to referents, patients with HS had a significantly higher risk of all-cause death (hazard ratio [HR, 2.48; 95% CI, 1.53-4.03, P < 0.001) and cardiovascular- or cerebrovascular-related death (HR, 2.85; 95% CI, 1.10-7.40, P = 0.03). However, these risks were attenuated by adjusting for smoking history: all-cause HR, 1.65 (95% CI, 0.97-2.82, P = 0.07) and cardiovascular- or cerebrovascular-related HR, 2.03 (95% CI, 0.71-5.81, P = 0.18). The 71% of patients were former or current smokers at the time of HS diagnosis.

CONCLUSIONS: Hidradenitis suppurativa patients have a substantially increased risk of death from any cause, including cardiovascular or cerebrovascular causes; the risk is especially dependent on smoking history.

PMID:36097962 | DOI:10.1111/ijd.16409

Zhonghua Kou Qiang Yi Xue Za Zhi. 2022 Sep 9;57(9):946-952. doi: 10.3760/cma.j.cn112144-20220302-00087.

ABSTRACT

Objective: To investigate the project characteristics of oral clinical trials registered in Chinese Clinical Trial Registry (ChiCTR), and to provide reference for medical institutions to improve the quality of oral clinical trials and formulate management systems. Methods: The ChiCTR database was retrieved to collect all the oral-related clinical trials from the time of database establishment to July 25, 2021. Those clinical trials were analyzed statistically in respect of name of registered project, registration time, registration status, regional distribution of research institutions, approval status by ethics committee, sample size, source of funds, involved disease, research type and design, randomization method, and whether blind method was adopted. Results: A total of 778 oral clinical trials, which studied mainly in the oral and maxillofacial diseases, periodontal tissue diseases, oral implant diseases, oral mucosal diseases, and oral prosthetic diseases, were retrieved in the database. Beijing, Sichuan, Shanghai, Guangdong and Hubei were major regions where oral clinical trials were carried out, accounting for 69.68% (772/1 108) of the total. The top four funding sources were hospital finance [24.93% (186/746)], local government finance [22.39% (167/746)], self-financing [17.69% (132/746)], and national finance [12.47% (93/746)]. For the types of researches, 520 interventional studies and 244 observational studies were identified (accounting for 66.84% and 31.36%, respectively). The research designs were dominated by ways of randomized control (381, 48.97%), of which 240 (62.99%) trials were with missing or unspecified blinding methods. Conclusions: Oral clinical trials are increasing year by year, but they are regionally imbalanced, and still need to be further improved in registration information and research design. Administrative departments should pay more attention to strengthen the publicity and education on the registration and publication mechanism of clinical trials, and enhance researchers’ cognitions in clinical trials registration and clinical trials design.

PMID:36097942 | DOI:10.3760/cma.j.cn112144-20220302-00087

Zhonghua Kou Qiang Yi Xue Za Zhi. 2022 Sep 9;57(9):927-931. doi: 10.3760/cma.j.cn112144-20220126-00032.

ABSTRACT

Objective: To compare the accuracy and retention of denture bases fabricated by injection molding, milling, and three-dimensional (3D) printing fabricating, in order to provide some references for clinical practice. Methods: A maxillary edentulous jaw model made was used to duplicated 10 working casts. The casts were numbered and scanned. The wax pattern was designed by digital ways and conventional methods and then the denture bases were fabricated by injection molding, milling, and 3D printing. The tissue surface of experimental denture base was obtained using a dental laboratory scanner. The deviation between the tissue surface of the fabricated denture bases and the working model was evaluated. A digital force gauge was used to measure the traction force. Results: The milling group [(0.076±0.026) mm] was more accurate than the 3D printing group [(0.117±0.041) mm] (P<0.05) and the injection group [(0.120± 0.025) mm] (P<0.05). The accuracy of 3D printing group and that of injection group were not statistically significant (P>0.05). The milling group [(9.55±2.44) N] demonstrated greater retentive force than 3D printing group [(5.19±0.06) N] and injection molding group [(1.52±0.52) N] (P<0.05). Conclusions: The denture base fabricated by milling was more accurate and showed the greatest retentive force than the other groups. And 3D printing group showed better retentive force than the injection molding group. Both digital manufacturing methods can meet the requirements of clinical application.

PMID:36097939 | DOI:10.3760/cma.j.cn112144-20220126-00032

Zhonghua Kou Qiang Yi Xue Za Zhi. 2022 Sep 9;57(9):907-913. doi: 10.3760/cma.j.cn112144-20220127-00033.

ABSTRACT

Objective: To compare the treatment effect of distraction osteogenesis (DO) and maxillomandibular advancement (MMA) for severe obstructive sleep apnea hypopnea syndrome (OSAHS) patients and to guide clinical decisions about treatment of OSAHS. Methods: Thirty-seven OSAHS patients which accepted maxillomandibular advancement (MMA) or distraction osteogenesis (DO) in Stomatological Hospital of the Department of Maxillofacial Trauma and Orthognathic Surgery, School of Stomatology, The Forth Military Medical University from June 2017 to June 2019 were collected. Their preoperative and postoperative data of cephalometry, polysomnography (PSG), Pittsburgh sleep quality index (PSQI) and Epworth sleepiness scale (ESS) scores were collected and analyzed. With propensity score matching method, the treatment effect of MMA and DO was analyzed and compared. Results: According to the statistics of MMA group, only AHI was correlated with operative successful rate and cure rate. With the increase of AHI, the treatment effect of MMA on OSAHS patients gradually decreased. The cut-off point of AHI as a predictor of MMA treatment failure was 78.2 n/h. All the matched cases were severe OSAHS patients. Statistical analysis showed that the mandibular elongation of DO patients[(24.00±4.39) mm] was significantly more than that of MMA group [(11.20±1.37) mm] (t=-6.11, P<0.001), the improvement of PSG index [including lowest oxygen saturation (LSpO₂), longest apnea (LA) and longest hypopnea (LH)] in DO group [LSpO₂=(93.40±1.82)%; LA=(18.28±8.32) s; LH=(61.84±32.94) s] was significantly higher than that in the MMA group [LSpO₂=(86.00±4.06)%, LA=(64.08±21.78) s, LH=(172.40±30.70) s](t=-3.72, P=0.005; t=4.39, P=0.003; t=5.49, P=0.004). The PSQI and the ESS scores of DO group (PSQI=4.20±0.83; ESS=3.40±1.52) were also significantly better than that of MMA group (PSQI=8.80±2.39, ESS=9.40±2.88)(t=4.07, P=0.001; t=4.12, P=0.002). Conclusions: For severe OSAHS patients, the objective and subjective indicators of DO treatment group showed a better therapeutic effect than that of MMA.

PMID:36097936 | DOI:10.3760/cma.j.cn112144-20220127-00033

Zhonghua Jie He He Hu Xi Za Zhi. 2022 Sep 12;45(9):894-903. doi: 10.3760/cma.j.cn112147-20220112-00045.

ABSTRACT

Objective: To identify the differentially expressed genes (DEGs) induced by tuberculosis peptide-based vaccine MP3RT in a humanized mouse model using transcriptomics technology. Methods: This study was conducted from August 2019 to February 2022. We used edgeR software to screen DEGs with a fold change greater than or equal to 1.5 and a P value less than 0.05 as screening conditions. Gene ontology (GO), Kyoto encyclopedia of genes and genomes (KEGG), and protein interaction network analyses were performed on the screened DEGs. Then, these DEGs were verified by RT-qPCR and statistically analyzed by GraphPad Prism 8 software. Results: A total of 367 DEGs (214 up-regulated and 153 down-regulated) were identified by transcriptomics. Bioinformatics analysis showed that the GO enrichment of the DEGs mentioned above significantly focused on cell metabolism, growth, apoptosis, inflammation, and other terms. In contrast, the KEGG enrichment significantly focused on inflammatory pathways such as the MAPK signaling pathway. Protein interaction network analysis showed that protein Abl1 had the highest aggregation, the highest aggregation coefficient, and the best connectivity. RT-qPCR results showed that gene expressions of cpne4 (t=2.48, P=0.048 0), h2-q10 (t=2.95, P=0.025 6), mef2c (t=2.87, P=0.028 4), cr2 (t=3.23, P=0.178), ablim1 (t=2.91, P=0.033 5), dll1 (t=2.70, P=0.027 3) and ms4a2 (t=3.03, P=0.019 2) genes in the MP3RT group were significantly up-regulated than those in the PBS group, while gene expressions of cd163l1 (t=2.56, P=0.043 0), il1r1 (t=2.91, P=0.022 7) and cd34 (t=2.42, P=0.046 2) genes in the MP3RT group were significantly down-regulated than those in the PBS group. Conclusions: The MP3RT vaccine induced 367 DEGs in humanized mice, which were associated with metabolic and immune responses. Furthermore, we found that p38 MAPK and JNK/MAPK signaling pathways played an important role in the molecular mechanism of the MP3RT vaccine.

PMID:36097927 | DOI:10.3760/cma.j.cn112147-20220112-00045

Zhonghua Jie He He Hu Xi Za Zhi. 2022 Sep 12;45(9):888-893. doi: 10.3760/cma.j.cn112147-20220127-00078.

ABSTRACT

Objective: To investigate the development of tuberculosis screening-related tests in general public hospitals(GPHs) of different levels in Hunan Province and the”awareness and practice of screening tuberculosis in diabetic patients”by doctors directly involved in diabetes diagnosis and treatment in the hospitals, aiming to provide reference for the formulation of the tuberculosis-diabetes joint prevention and control activity plan based on our national conditions. Methods: Stratified sampling was used to select 43 GPHs at three different levels in Hunan province: 14 tertiary GPHs, 13 secondary GPHs, and 16 primary GPHs. 284 endocrinologists working in enrolled hospitals were invited to participate in the on-site questionnaire-survey and 277 qualified. The study used SPSS 22.0 statistical software to analyze the data. The prevalence rate of tuberculosis screening test among hospitals at all levels was compared by chi-square test, and logistic regression was used to analyze the related factors affecting doctors’ screening awareness. P≤0.05 was considered statistically significant. Results: The allocation of digital X-ray cameras, tuberculin skin tests, sputum acid-fast bacillus smears, sputum cultures for Mycobacterium tuberculosis, and interferon-gamma release assays in the 43 GPHs were 90.7% (39/43), 72.1% (31/43), 55.8% (24/43), 34.9% (15/43), 27.9% (12/43) with significant differences between the different hospital levels(P<0.05). 173 endocrinologists considered it necessary to proactively initiate tuberculosis screening for patients at first diagnosis. When admitting patients, 197 endocrinologists chose tuberculosis screening only for diabetes mellitus patients with suspected tuberculosis symptoms. The most possible reasons why diabetes mellitus patients wouldn’t undergo tuberculosis screening were”patients refused(76.5%, 212/277)”,”patients didn’t complain of the symptom(46.9%, 130/277)”, and”tuberculosis screening-related tests haven’t been conducted in the hospital(35.7%, 99/277)”. Conclusions: Although endocrinologists displayed some tuberculosis-related knowledge and awareness of the need for proactive tuberculosis screening, the actual screening rate in the clinical setting was low. This may be related to multiple factors, including those of patients, doctors, and medical institutions.

PMID:36097926 | DOI:10.3760/cma.j.cn112147-20220127-00078

Vet Med Sci. 2022 Sep 12. doi: 10.1002/vms3.952. Online ahead of print.

ABSTRACT

BACKGROUND: Nowadays ingestion of indigestible foreign bodies poses serious economic loss to domestic ruminants, especially in a developing country.

OBJECTIVES: The study aims to determine the prevalence of indigestible foreign bodies in the forestomach of domestic ruminants slaughtered at Bishoftu Elfora Export Abattoir and its associated potential risk factors and identify the location and type of these indigestible foreign bodies.

STUDY ANIMALS: On 384 domestic ruminants (171 goats, 125 sheep and 88 cattle) presented for slaughter from different zones of the region.

METHODS: Cross-sectional study design was conducted from May 2021 to September 2021. Each animal was subjected to ante-mortem and post-mortem inspection by providing a unique identification number. For post-mortem examination, the forestomach was carefully removed from the abdominal cavity. For the positives, the location was properly recorded, washed, identified and photographed.

RESULTS: The overall prevalence of indigestible foreign bodies in domestic ruminants was 30.73% (118/384). Of these, 32.75% (56/171), 28% (35/125) and 30.68% (27/88) were recorded in goats, sheep and cattle, respectively, without statistically significant difference (p > 0.05). Aged domestic ruminants 39.3% (33/84) had poor body conditions 38.98% (23/59), originated from the Borena zone 42.11% (16/38) and were relatively recorded with higher prevalence. From the forestomach compartments, the indigestible foreign bodies were majorly found in rumen 86.43% (102/118) and reticulum 13.56% (16/118) with a statistical difference (p < 0.05).

CONCLUSION AND CLINICAL IMPORTANCE: Ingestion of indigestible foreign bodies mainly during the dry season due to shortage of forage, less biodegradable and negligent waste disposal like plastic bags attribute environmental and animal health problems and pose loss to the national economy.

PMID:36097138 | DOI:10.1002/vms3.952

Mol Biol Rep. 2022 Sep 12. doi: 10.1007/s11033-022-07761-y. Online ahead of print.

ABSTRACT

BACKGROUND: In cancer research, one of the most significant findings was to characterize the DNA repair deficiency as carcinogenic. Amongst the various repair mechanisms, mismatch repair (MMR) and direct reversal of DNA damage systems are designated as multilevel safeguards in the human genome. Defects in these elevate the rate of mutations and results in dire consequences like cancer. Of the several molecular signatures in human genome, tandem repeats (TRs) appear at various frequencies in the exonic, intronic, and regulatory regions of the DNA. Hypervariability among these repeats in the coding and non-coding regions of the genes is well characterized for solid tumours, but its significance in haematologic malignancies remains to be explored. The purpose of our study was to elucidate the role of nucleotide repeat instability in the coding and non-coding regions of 10 different repair genes in myeloid and lymphoid cell lines compared to the control samples.

METHODS AND RESULTS: We selected MMR deficient extensively studied microsatellite instable colorectal cancer (HCT116), and MMR proficient breast cancer (MCF-7) cells along with underemphasized haematologic cancer cell lines to decipher the hypermutability of tandem repeats. A statistically significant TR variation was observed for MSH2 and MSH6 genes in 4 and 3 of the 6 cell lines respectively. KG1 (AML) and Daudi (Burkitt’s lymphoma) were found to have compromised DNA repair competency with highly unstable nucleotide repeats.

CONCLUSION: Taken together, the results suggest that mutable TRs in intronic and non-intronic regions of repair genes in blood cancer might have a tumorigenic role. Since this is a pilot study on cell lines, high throughput research in large cohorts can be undertaken to reveal novel diagnostic markers for unexplained blood cancer patients with normal karyotypes or otherwise with karyotypic defects.

PMID:36097110 | DOI:10.1007/s11033-022-07761-y

Neurosurg Rev. 2022 Sep 12. doi: 10.1007/s10143-022-01858-5. Online ahead of print.

ABSTRACT

Postoperative seizures are a frequently occurring yet not well-understood complication in patients undergoing surgical treatment of chronic subdural haematomas (cSDHs). Therefore, we investigated surgical and non-surgical risk factors that are commonly considered causal in provoking epileptic seizures, paying special attention to the intracranial course of the subdural drain (SDD) and the configuration of the haematoma. Data of patients with a cSDH, that were treated at our neurosurgical department between 2008 and 2014 were analysed. Patients suffering from severe pre-existing conditions and those who have been treated conservatively were excluded. Epidemiologic data as well as relevant clinical data were collected. Pre- and postoperative CT scans were analysed regarding morpho- and volumetric parameters. In order to objectify the influence of the SDD, its intracranial course and localisation (entering angle as well as the angle between drain and brain surface) were measured. For statistical analysis, univariate and multiple logistic regression models as well as Fisher’s exact test were used. Two hundred eleven consecutive patients have been included. Mean age was 75.6 years, and 69% were male. Nineteen (9%) patients suffered from postsurgical seizures. Membranes within the haematoma were present in 81.5%. Pre- to postoperative haematoma reduction was significant (mean of difference – 12.76 mm/ – 9.47 mm in coronal/axial CT planes, p = 0.001/ < 0.001). In 77.9%, SDD showed cortical contact with eloquent regions and had an unfavourable course in 30 cases (14.2%). Surgical complications consisted of cortical bleeding in 2.5%, fresh subdural haematoma in 33.5% and wound infections in 1.4% of patients. Neither in univariate nor in multiple regression analyses any of the following independent variates was significantly correlated with postsurgical seizures: pre-existing epilepsy, alcohol abuse, right-sided haematomas, localization and thickness of haematoma, presence of septations, SDD-localization and to-brain angle, subdural air, and electrolyte levels. Instead, in multiple regression analyses, we found the risk of postsurgical seizures to be significantly correlated and increased with left-sided cSDH treated via craniotomy (p = 0.03) and an unfavourable course of the SDD in left-sided cSDH (p = 0.033). Burr hole trepanation should be preferred over craniotomy and care must be taken when placing a SDD to avoid irritating cortical tissue. The configuration of the haematoma does not appear to affect the postoperative seizure rate.

PMID:36097085 | DOI:10.1007/s10143-022-01858-5