ABSTRACT
OBJECTIVE: To investigate the effect of study and life patterns on the visual acuity of primary and secondary school students in Wuhan, China, during the COVID-19 pandemic. STUDY DESIGN: We investigated factors influencing the development of myopia using questionnaires presented to students in primary and secondary schools in Wuhan. After school resumed in September 2020, we obtained 15,596 valid questionnaires. Students who submitted valid questionnaires were examined for visual acuity and computerized optometry, from which 15,428 valid examination results were obtained. Then we cornpared these results with the screening data collected during the same period the previous year (September 2019). RESULTS: The overall prevalence of myopia among primary and secondary school students in Wuhan in 2020 was 59.95%, representing a 6.02% increase as compared with levels in 2019. For primary, junior, and senior high school students, this increase was 9.76%, 5.30%, and 2.79%, respectively. Primary school students primarily exhibited an increase in mild myopia (7.49%), while junior and senior high school students presented with increased rates of moderate (4.51%;5.74%) and high (1.17%;2.95%) myopia. Compared with 2019, senior high school students exhibited the most pronounced deepening of spherical equivalent, which deepened by -0.639 D, -0.774 D, and -0.775 D from Grade 1-3. In 2020 the students in Wuhan spent <1 hour on outdoor activities, but primary, junior, and senior high school students were engaged with online courses for 3.184 hours, 5.828 hours, and 6.239 hours and electronic products outside of online learning for 1.502 hours, 1.788 hours, and 2.146 hours, respectively. Multivariate logistic regression analysis showed that being female, high grade, long time of near-work, long time of using electronic product, the students' age of using electronic products for the first time was <= 3 years old, parents' myopia, and high education level were risk factors for myopia, while outdoor activity was a protective factor for myopia. CONCLUSION: During COVID-19, home-based online learning mode significantly increased the prevalence of myopia among students in Wuhan. The occurrence of myopia is related to heredity and eye use behavior. Increasing outdoor activities and reducing near-work time are important measures to prevent and control myopia occurrence.
ABSTRACT
This public health incident transformed teaching activities from offline to online. The media content and comments on social media provide a dataset for digging the public opinion on online learning. This study uses the GDELT and TWITTER platforms' data, searching "COVID" and "online education" as keywords;the relevant information is collected and analyzed in python. The results of this public opinion mining will play an essential role in discovering the problem of online teaching in this pandemic.
ABSTRACT
Oitline teaching arc facing drikmatic challenges due to the COVIDI9 pandemic requiring massive online education. Students are experiencing mental and physical isolation during this period. This research :Aims to find an efficient may to discover students emotion status through 1,;El: patient recognition (1'10. Traditional PR !method,' haie been applied eNtensikeh in 1":Ft;recognition including Artificial Neuron Networks iANNi, Support Vector Nlak'hinekSVNI Nearest Xeighhorc (KNN), and so on. In this paper, a association rule -based PR method has been introduced through incorporating clustering and Apriori association rube methods. The experimental results demonst rale that Ute tgdimized rule -based 1":F:t;PR model Can improve real-time recognition eflicienc. Tlic proposed model can Ike used for identifying students cognitive statuses and improve educational perfikrrnunce in (.0\11/19 period
ABSTRACT
OBJECTIVE: Coronavirus disease 2019 (COVID-19) has elevated mortality in severe and critical patients globally. This study examined the effect of glucocorticoids (GCS) on the time of virus clearance and absorption of lung lesions in severe and critical COVID-19 patients. PATIENTS AND METHODS: Severe and critical COVID-19 cases diagnosed in Wuhan Pulmonary Hospital from January 7 to February 10, 2020 were analyzed. The generalized linear model was utilized to assess the effects of GCS therapy on the times of nucleic acid test turning negative and improved pulmonary imaging, respectively. RESULTS: Of 66 patients, 51 (77.3%) and 15 (22.7%) were severe and critical cases, respectively, and aged 62 ± 11 years. A total of 58 patients (87.9%) tested negative, and 56 (84.8%) showed improved lung imaging. Age, thrombocytopenia, CD8 + T cell count, course of GCS therapy, and total dose were correlated with the time of nucleic acid test turning negative (p < 0.05), and sex was correlated with the time of initial pulmonary imaging improvement (p < 0.05). The time of nucleic acid test turning negative in individuals with GCS therapy course ≤ 10 days was shorter than that of the GCS therapy course > 10 days group (p=0.001). No statistical difference was found in the dose, course of GCS, and initial time of improved lung imaging. CONCLUSIONS: Increasing the dose of GCS and prolonging the course of treatment do not shorten the time of nucleic acid test turning negative or improved absorption of pulmonary lesions. Thus, the rational use of GCS is particularly important.