Chinese Academic Journals Full-text Database Research Articles

Usage pattern analysis of academic articles from Chinese journals

Usage metrics have become increasingly popular in scientometric with the advent of electronic resources. While most current researches relied on the usage data retrieved from English publishers. In this study, the usage data was extended to Chinese publishers. We collected and analyzed the usage data of six well-known Chinese OA (Open Access) journals in different fields from journals’ official websites and Chinese Academic Journals Full-text Database (CJFD) in China National Knowledge Infrastructure (CNKI). It was found that websites’ information architecture affected usage pattern. “Progressive rule”-based site guided users to view full-text articles more than download them and “parallel rule”-based site guided users to download full-text articles more than view them. CNKI proved its popularity in China. Although CNKI is a non-OA platform and has a time delay in indexing full-text articles, but they still attracted a large number of users. PDF tended to be the preferred format than HTML in most journals in the study. Also, CNKI citation were more skewedly distributed than usage data in most journals and it showed strong or moderate correlation between CNKI citation and CNKI full-text downloads in most journals. Finally, it depicted that usage data of most articles was at their peak around pagination month and at the bottom at very earlier or later months.

The Impact of Subclinical Hypothyroidism on Patients with Polycystic Ovary Syndrome: A Meta-Analysis.

The association between subclinical hypothyroidism (SCH) and polycystic ovary syndrome (PCOS) has been shown in many studies. These findings are still controversial, however. It is unclear whether the co-incidence of subclinical hypothyroidism and polycystic ovary syndrome will affect the severity of metabolism. Therefore, we performed this meta-analysis to investigate the association. A comprehensive search strategy was developed to obtain all relevant studies published in PubMed, EMBASE, Cochrane Library, and Chinese Academic Journal Full-text Database (CNKI) up to 31 December 2020. We adopted the standardized mean difference (SMD) with 95% confidence intervals (CI) for evaluation, and sensitivity analysis was performed. Publication bias was analyzed and represented by a funnel plot, and funnel plot symmetry was assessed with Egger's test. Twenty-seven studies with 4821 participants (1300 PCOS patients with SCH, 3521 PCOS patients without SCH) were included in the present meta-analysis,among which 71.31% chinese patients out of the total. The results showed that PCOS patients with SCH had higher levels of HOMA-IR, TG, TC, LDL, FBG, FCP, PRL and lower levels of HDL, LH and T. It also recognized the limitation of the lack of a consistent definition of hypothyroidism in the 27 studies included. The results of this study indicated that SCH may aggravate lipid and glucose metabolism in patients with PCOS.

Comparison of surgical outcomes of lumbar disc herniation using local anesthesia and epidural anesthesia

We performed this meta-analysis to evaluate the effects of epidural anesthesia and local anesthesia on the surgical outcomes of lumbar disc herniation (DH).Electronic databases including PubMed, EMBASE, Cochrane Library, and the Chinese Academic Journal Full-text Database were searched to identify randomized controlled trials (RCTs) that reported on the effects of local anesthesia and epidural anesthesia in lumbar DH surgical management. Evaluation indicators included: onset time of anesthesia, patient satisfaction, and the rate of adverse effects. There were 6 RCTs with a total of 606 patients in this meta-analysis: 274 cases in the local anesthesia group and 332 in the epidural anesthesia group.This meta-analysis demonstrated that the epidural anesthesia group had a better analgesic effect, a lower adverse effect rate (mean difference [MD] = 0.21, 95% confidence interval [CI] [0.08, 0.54], P = .001) and a better satisfaction rate: (MD = 6.54, 95% CI [2.77, 15.45], P < .0001). The duration of anesthesia was not statistically significant.Epidural anesthesia is a better choice for lumbar DH surgery compared to local anesthesia.

Spatial Distribution and Dynamic Changes in Research Hotspots for Desertification in China Based on Big Data from CNKI

Desertification research plays a key role in the survival and development of all mankind. The Normalized Comprehensive Hotspots Index (NCH) is a comprehensive index that reveals the spatial distribution of research hotspots in a given research field based on the number of relevant scientific papers. This study uses Web Crawler technology to retrieve the full text of all Chinese journal articles spanning the 1980s–2018 in the Chinese Academic Journal full-text database (CAJ) from CNKI. Based on the 253,055 articles on desertification that were retrieved, we have constructed a research hotspot extraction model for desertification in China by means of the NCH Index. This model can reveal the spatial distribution and dynamic changes of research hotspots for desertification in China. This analysis shows the following: 1) The spatial distribution of research hotspots on desertification in China can be effectively described by the NCH Index, although its application in other fields still needs to be verified and optimized. 2) According to the NCH Index, the research hotspots for desertification are mainly distributed in the Agro-Pastoral Ecotone and grassland in Inner Mongolia, the desertification areas of Qaidam Basin in the Western Alpine Zone and the Oasis-Desert Ecotone in Xinjiang (including the extension of the central Tarim Basin to the foothills of the Kunlun Mountains, the sporadic areas around the Tianshan Mountains and the former hilly belt of the southern foothills of the Altai Mountains). Among these three, the Agro-Pastoral Ecotone in the middle and eastern part of Inner Mongolia includes the most prominent hotspots in the study of desertification. 3) Since the 1980s, the research hotspots for desertification in China have shown a general downward trend, with a significant decline in 219 counties (10.37% of the study area). This trend is dominated by the projects carried out since 2002. The governance of desertification in the eastern part of the Inner Mongolia-Greater Khingan Range still needs to be strengthened. The distribution of desertification climate types reflects the distribution of desertification in a given region to some extent. The Normalized Comprehensive Hotspots Index provides a new approach for researchers in different fields to analyze research progress.

The effect of empowerment education on depression level and laboratory indicators of patients treated with hemodialysis: a meta-analysis

Abstract Objective The objective of this study was to evaluate the effect of empowerment education on depression level and laboratory indicators of patients treated with hemodialysis. Methods We searched databases including Cochrane Library, Web of Science, Embase, PubMed, Chinese Biomedical Literature Database (CBM), Chinese Academic Journals Full-text Database (CNKI), VIP, and Wanfang. We included all the researches about the application of empowerment education in patients treated with hemodialysis. We used RevMan 5.3 to analyze the data after assessing the quality of researches. Results We included 10 studies eventually. The results of meta-analysis showed that the self-efficacy [MD = 1.10, 95% confidence interval (CI; 0.71, 1.48), P &lt; 0.01], depression [MD = -6.94, 95% CI (-8.53, -5.34), P &lt; 0.01], serum creatinine [Scr; MD = -116.46, 95% CI (-171.90, -61.03), P &lt; 0.01], albumin [Alb; MD = 2.93, 95% CI (2.00, 3.86), P &lt; 0.01], and blood urea nitrogen [BUN; MD = -0.95, 95% CI (-1.89, -0.01), P = 0.05] in the empowerment education group had significantly statistical difference compared with those in the usual education group. However, there was no significant difference in hemoglobin [Hb; MD = 3.03, 95% CI (-0.64, 6.70), P = 0.11] between two groups. Conclusions Empowerment education can improve the self-efficacy in patients treated with hemodialysis, relieve depression, and improve Scr, Alb, and BUN. However, there is no significant improvement in Hb; it needs further exploration in clinical practice.

Influence of different lying positions on monitoring of central venous pressure in patients with mechanical ventilation: a systematic review

Objective To review systematically the influence of different lying positions on monitoring of central venous pressure (CVP) in patients with mechanical ventilation. Methods Relevant articles published publicly from database establishment date to June, 30th, 2018 in PubMed, Cochrane Library, Embase, Web of Science, CBM, Chinese Academic Journal Full-text Database (CJFD) , Wanfang and VIP Database were searched on computer. Two researchers independently screened and extracted the literature. RevMan 5.3 software was used for meta-analysis of the included studies. Results Nine literatures were included, including 380 subjects. Meta-analysis showed that there were significant statistical differences in CVP values between 30 degree semi-recumbent position and supine position (WMD=-0.70, 95%CI: -1.15--0.24, P=0.003) , and between 45 degree semi-recumbent position and supine position (WMD=-1.34, 95%CI: -1.82--0.86, P<0.001) , and between 60 degree semi-recumbent position and supine position (WMD=-2.96, 95%CI: -3.91--2.00, P<0.001) . Conclusions There are differences between the CVP measurements in the 30°, 45°, 60° hemi-recumbent position and the supine position. To ensure the accuracy of the CVP measurement values in mechanical ventilation patients, we should take the supine position for measurement. Key words: Central venous pressure; Lying position; Monitoring; Mechanical ventilation; Systematic review

Efficacy and safety of endonasal phototherapy in the treatment of adult allergic rhinitis: A Meta-analysis

Objective:To perform a systematic review of the efficacy and safety of endonasal phototherapy in the treatment of AR, and to provide evidence of evidence-based medicine for clinical application. Method:Databases were from PubMed, Embase, Cochrane Library, Chinese Academic Journal Full-text Database (CNKI) and Wanfang database. A randomized controlled trial (RCT) or clinical study literature on intranasal phototherapy for adult AR is available, and the deadline is March 2017. Based on the literature inclusion and exclusion criteria, the related literatures were selected and the quality was evaluated by using the Cochrane inclusion bias assessment table. Meta-analysis was performed with Revman 5.3 software. For continuous outcomes, the weighted mean difference (WMD) and its 95% confidence intervals (CI) were calculated, forest maps and funnel plots were drew. For uncontinuous outcomes, the odds ratio (OR) and its 95%CI were calculated, and forest maps and funnel plots were drew. The efficacy included total nasal symptom scores (TNSS), rhinoconjunctivitis quality of life questionnaire (RQLQ) and palate itching scores, and the safety was assessed by incidence rate of severe drying and mild drying of nasal mucosa. Result:A total of 12 articles were selected, including 5 RCT and 7 clinical studies, and there were 615 adult AR patients. The Meta-analysis shows that endonasal phototherapy significantly reduced the TNSS, RQLQ and palate itching scores, the incidence rate of mild drying of nasal mucosa was higher in comparison with pretreated values, and the difference was statistically significant (P<0.05). The rate of severe drying of nasal mucosa was higher, but the difference was not statistically significant (P>0.05). It also shows that endonasal phototherapy significantly reduced the TNSS, RQLQ and palate itching scores, and the rate of mild drying of nasal mucosa was higher in comparison with placebo and antihistamines groups, and the difference was statistically significant. The rate of severe drying of nasal mucosa was higher, but the difference was not statistically significant. Conclusion:Endonasal phototherapy can improve the symptoms of TNSS, RQLQ and palate itching score in patients, and the safety is also confirmed.Patients who are not satisfied with symptom relief may choose to use it.

Tools to assess risk of bias in systematic reviews of nursing intervention in China: Global implications of the findings

BackgroundThe number of systematic reviews (SRs) of nursing interventions is increasing in China. Authors of such studies are encouraged to use a risk of bias tool for assessing individual studies. Therefore, it is important to know how these tools have been applied in SRs in Chinese nursing. PurposeThe purpose of the study is to examine risk of bias tools used by Chinese nursing researchers to assess the quality of individual studies included in SRs of nursing interventions. MethodsWe searched the Chinese Biomedical Literature Database, Chinese Journal Full-Text Database, Chinese Academic Journal Full-Text Database, and Wanfang Database. Each relevant review found was subjected to quality assessment, data synthesis, and comprehensively described. DiscussionTwo hundred eight SRs were identified, most (94.7%) of which used the words “systematic review” or “meta-analysis” in their titles. Most used quality assessment rather than risk of bias as their major method to gauge quality; 7.6% reported on six domains of the Cochrane risk of bias tool. Only four provided a risk of bias graph/summary figure. ConclusionsMany SRs of nursing interventions are published in Chinese journals, and their assessment of risk of bias is usually either lacking or incomplete, potentially producing misleading results. This may also be the case in other countries. Assessment of risk of bias in SRs is a requisite. Authors who systematically review nursing literature should follow the latest Cochrane Collaboration Handbook.

Risk population of Helicobacter pylori infection among Han and Tibetan ethnicities in western China: a cross-sectional, longitudinal epidemiological study

BackgroundChina has a high prevalence of Helicobacter pylori infection, with high mortality from gastric cancer. However, there is no established nationwide screening programme for the primary prevention of gastric cancer in China. This study aimed to investigate the prevalence of Helicobacter pylori infection in Sichuan province in western China and to identify high-risk subpopulations for screening. MethodsA high-volume hospital-based cross-sectional study included symptomatic patients who underwent 14C-urine breath tests from April, 2013, to March, 2014. Patients with gastric cancer or lymphoma were excluded. Positivity, severity, and disintegrations per minute from 14C-urine breath tests were analysed. Longitudinal prevalence at Sichuan province was retrieved through a literature search of the Chinese Academic Journals Full-text Database. FindingsA total of 16751 individuals were analysed in the present cross-sectional study (median age 47 years, IQR 38–57; 47·5% male). Additionally, nine hospital-based cross-sectional studies (18 703 individuals) were included in the meta-analysis. The overall prevalence of Helicobacter pylori infection declined dramatically from 56·6% to 41·1% between 2008 and 2014. People younger than 20 years had the lowest prevalence (31·9%), while adults aged 40–49 years had the highest prevalence (42·5%). The ethnic minority population (predominantly Tibetan) presented a higher prevalence (58·9%) than the Han Chinese population (40·8%), while meta-analysis found a higher risk among Tibetan people compared with Han Chinese people (OR 1·37, 95% CI 1·24–1·52, p=0·008). Although overall prevalence was similar between males and females (1·01, 0·96–1·06, p=0·661), proportions of severe infection were significantly higher among adult and older infected females (>20 years old) compared with adult and older males (2·87, 2·50–3·30, p<0·001). InterpretationScreening for H pylori infection is optional for symptomatic patients aged 20–39 years, but screening is recommended for patients from ethnic minority populations, women, and patients older than 40 years in regions of China with intermediate prevalence of H pylori. Cost-effectiveness of screening strategies needs further investigation. FundingNational Natural Science Foundation of China (No 81301866) and Outstanding Young Scientific Scholarship Foundation of Sichuan University, from the Fundamental Research Funds for the Central Universities of China (No 2015SCU04A43).

The relevance between obstructive sleep apnea hypopnea syndrome andchronic obstructive pulmonary disease in China: A Meta-analysis

Objective:To assess the correlation between obstructive sleep apnea hypopnea syndrome(OSAHS) and chronic obstructive pulmonary disease(COPD).Method: Databases such as Chinese Biomedical Literature Database, PubMed, Chinese Academic Journals full-text database, Wanfang Resource Database and Chongqing VIP have been searched to collect literatures about the relationship between OSAHS and COPD. The literature in conference proceedings and certain unpublished articles were also manually retrieved. RCT conformed to the condition was evaluated according to the standards of literature assessment, and the data has been extracted. The RevMan5.3 software was applied to carry out the same Metaanalysis.Result: Totally 19 articles were included, and Metaanalysis reveal that overlap syndrome(OS) patient's apnea hypopnea index is significantly higher than those of OSAHS patients［WMD=7.56, 95%CI（4.19,10.94）, P<0.01］; The LSaO₂ of OS patients is significantly lower than OSAHS patients［WMD=-10.50, 95%CI(-11.58, -6.08),P<0.01］; OS patients' FEV₁/FVC is significantly lower than COPD patients［WMD=4.65,95%CI（1.15,8.15）,P<0.01］.The results revealed that subgroup analysis according to the sample volume, age, body mass index(BMI) and FEV₁/FVC between OS patients and OSAHS patients has heterogeneity, but when analysis with the score of ESS the heterogeneity does not exist. Further, the subgroup analysis according to the sample volume, BMI, AHI,LSaO₂ and the time of Oxygen is lower than 90%(T90) those index between OS patients and COPD patients has heterogeneity, and the heterogeneity does not exist when subgroup is analyses with neck circumference. The funnel schema was nearly symmetry with little bias.Conclusion:The experimental results indicate that OSAHS is significantly related with COPD, and they may be the mutual risk factor for each other..

Association between obstructive sleep apnea hypopnea syndrome and type 2 diabetes in Chinese:a Meta analysis

Objective:The aim of this study is to assess the association between obstructive sleep apnea-hypopnea syndrome and type 2 diabetes (T2DM).Method:Databases such as Chinese Biomedical Literature Database,PubMed,Chinese Academic Journals full-text database,Wanfang Resource Database and Chongqing VIP have been searched to collect literatures about the relationship between OSAHS and type 2 diabetes.The papers and unpublished articles were also manually retrieved.Randomized controlled trial conformed to the condition were evaluated according to the standards of literature assessment,and the data has been extracted.The RevMan5.3 software was applied to carry out Meta-analysis.Result:Thirty studies are includedin the Meta-analysis.The fasting glucose content of OSAHS patients with T2DM is significantly higher than T2DM patients[WMD=1.01,95%CI(0.55,1.46), P<0.01];OSAHS with T2DM patients' apnea hypopnea index is significantly higher than OSAHS patients[WMD=3.78,95%CI(1.69,5.87),P<0.01];the fasting glucose content of OSAHS patients is also significantly higher than normal [WMD=1.16,95CI%(0.88,1.44),P<0.01];When stratified by rhe grades of OSAHS,we found fasting glucose content of all OSAHS patients is significantly higher than normal[WMD=1.09,95CI% (0.97,1.21),P<0.01];the funnel flot appeared to be symmetrical with little bias.Conclusion:The experimental results indicate that OSAHS is significantly related with T2DM ,and they may be the risk factorof each other.

Effect of breviscapine injection on clinical parameters in diabetic nephropathy: A meta-analysis of randomized controlled trials.

Diabetic nephropathy (DN) is currently a major public health problem worldwide. The objective of the present study was to evaluate the clinical effect of breviscapine injections in patients with DN. A meta-analysis was performed using the following databases to obtain published reports in any language: PubMed/MEDLINE, Embase, China National Knowledge Infrastructure, Chinese Evidence-Based Medicine, Wanfang Digital Periodicals, Chinese Academic Journals Full-text Database, Chinese Biological and Medical Database, China Doctoral and Masters Dissertations Full-text Database and the Chinese Proceedings of Conference Full-text Database. Two assessors independently reviewed each trial. A total of 35 randomized controlled trials, which performed studies on a total of 2,320 patients (1,188 in treatment groups and 1,132 in control groups), were included in the present meta-analysis. Data were analyzed using Stata version 11.0 for Windows. The results from the analysis demonstrated that breviscapine injections have greater therapeutic effects in patients with DN in comparison with the control group, including renal protective effects (reducing urine protein, serum creatinine and blood urea nitrogen) and adjustment for dyslipidemia (affecting levels of cholesterol, triglycerides and high density lipoproteins). These effects indicate that breviscapine injections are beneficial to patients with DN. Further studies are required to determine the mechanisms underlying the therapeutic effects of breviscapine.

Preconditioning crush increases the survival rate of motor neurons after spinal root avulsion.

OBJECTIVE:A meta-analysis of published randomized controlled trials investigating the long-term effect of dexamethasone on the nervous system of preterm infants.DATA SOURCES:Online literature retrieval was conducted using The Cochrane Library (from January 1993 to June 2013), EMBASE (from January 1980 to June 2013), MEDLINE (from January 1963 to June 2013), OVID (from January 1993 to June 2013), Springer (from January 1994 to June 2013) and Chinese Academic Journal Full-text Database (from January 1994 to June 2013). Key words were preterm infants and dexamethasone in English and Chinese.STUDY SELECTION:Selected studies were randomized controlled trials assessing the effect of intravenous dexamethasone in preterm infants. The quality of the included papers was evaluated and those without the development of the nervous system and animal experiments were excluded. Quality assessment was performed through bias risk evaluation in accordance with Cochrane Handbook 5.1.0 software in the Cochrane Collaboration. The homogeneous studies were analyzed and compared using Revman 5.2.6 software, and then effect model was selected and analyzed. Those papers failed to be included in the meta-analysis were subjected to descriptive analysis.MAIN OUTCOME MEASURES:Nervous system injury in preterm infants.RESULTS:Ten randomized controlled trials were screened, involving 1,038 subjects. Among them 512 cases received dexamethasone treatment while 526 cases served as placebo control group and blank control group. Meta-analysis results showed that the incidence of cerebral palsy, visual impairment and hearing loss in preterm infants after dexamethasone treatment within 7 days after birth was similar to that in the control group (RR = 1.47, 95%CI: 0.97–2.21; RR = 1.46, 95%CI: 0.97–2.20; RR = 0.80, 95%CI: 0.54–1.18; P > 0.05), but intelligence quotient was significantly decreased compared with the control group (MD = −3.55, 95%CI: −6.59 to −0.51; P = 0.02). Preterm infants treated with dexamethasone 7 days after birth demonstrated an incidence of cerebral palsy and visual impairment, and changes in intelligence quotient similar to those in the control group (RR = 1.26, 95%CI: 0.89–1.79; RR = 1.37, 95%CI: 0.73–2.59; RR = 0.53, 95%CI: 0.32–0.89; RR = 1.66, 95%CI: −4.7 to 8.01; P > 0.05). However, the incidence of hearing loss was significantly increased compared with that in the control group (RR = 0.53, 95%CI: 0.32–0.89; P = 0.02).CONCLUSION:Dexamethasone may affect the intelligence of preterm infants in the early stages after birth, but may lead to hearing impairment at later stages after birth. More reliable conclusions should be made through large-size, multi-center, well-designed randomized controlled trials.

Effect of dexamethasone on intelligence and hearing in preterm infants: a meta-analysis

In a previous study, heat shock protein 27 was persistently upregulated in ventral motor neurons following nerve root avulsion or crush. Here, we examined whether the upregulation of heat shock protein 27 would increase the survival rate of motor neurons. Rats were divided into two groups: an avulsion-only group (avulsion of the L4 lumbar nerve root only) and a crush-avulsion group (the L4 lumbar nerve root was crushed 1 week prior to the avulsion). Immunofluorescent staining revealed that the survival rate of motor neurons was significantly greater in the crush-avulsion group than in the avulsion-only group, and this difference remained for at least 5 weeks after avulsion. The higher neuronal survival rate may be explained by the upregulation of heat shock protein 27 expression in motor neurons in the crush-avulsion group. Furthermore, preconditioning crush greatly attenuated the expression of nitric oxide synthase in the motor neurons. Our findings indicate that the neuroprotective action of preconditioning crush is mediated through the upregulation of heat shock protein 27 expression and the attenuation of neuronal nitric oxide synthase upregulation following avulsion.

Meta-analysis of the effect of flupentixol and melitracen combined with conventional medicine on irritable bowel syndrome

Objective To evaluate the efficacy difference between flupentixol and melitracen combined with conventional medicine and conventional drug alone in the treatment of irritable bowel syndrome (IBS).Methods Studies on flupentixol and melitracen combined with conventional medicine (pinaverium bromide and trimebutine maleate) and conventional medicine alone in the treatment of IBS were collected and reviewed through searching the Chinese Academic Journals Full-text Database,Chinese VIP Full-text Database and PubMed database.After that,the test for homogeneity and the combined effect test were estimated. Results A total of 12 clinical studies on flupentixol and melitracen combined with conventional medicine for four to twelve weeks in the treatment of IBS were collected six studies indicated the homogeneity test of flupentixol and melitracen combined with pinaverium bromide (x2 =1.90,df=5,P=0.86,I2 =0).For the fixed-effect model,the odds ratio was 7.92 and 95％ CI was between 4.85 and 12.95,which suggested the combined therapy was better.The other six studies indicated the homogeneity test of flupentixol and melitracen combined with trimebutine maleate (x2 =5.60,df=5,P =0.35,I2 =10.6 ％).For the fixed-effect model,the odds ratio was 5.91 and 95％ CI was between 4.06 and 8.61,which suggested the combined therapy was better.After merging the 12 studies it indicated the homogeneity test of flupentixol and melitracen combined with conventional medicine (x2 =8.40,df =11,P =0.68,I2 =0).For the fixed effect model,the odds ratio was 6.63 and 95％ CI was between 4.92 and 8.93.Conclusion The efficacy of flupentixol and melitracen combined with conventional medicine in the treatment of IBS was better than that of conventional medicine alone,however,still more high quality trials are needed for further confirmation. Key words: Flupenthixol; Calcium channel blockers; Trimebutine; Maleates; Irritable bowel syndrome; Meta-analysis

Correlation between Download and Citation and Download-citation Deviation Phenomenon for Some Papers in Chinese Medical Journals

The authors collected the numbers of citations and downloads from 2005 to 2009 of papers in five Chinese general ophthalmological journals: Recent Advances in Ophthalmology, Chinese Ophthalmic Research, Ophthalmology in China, Journal of Clinical Ophthalmology and Chinese Journal of Practical Ophthalmology, published in 2005 from the Chinese Academic Journals Full-text Database and the Chinese Citation Database in Chinese National Knowledge Infrastructure (CNKI) to determine the correlation between download and citation and the peak time of download frequency (DF). The citations from 2000 to 2009 of papers published in 2000 were collected to determine the peak time of citation frequency (CF) of medical papers. There is a highly positive correlation between DF and CF (r = 4.91, P = 0.000).

Correlation between Download and Citation and Download-citation Deviation Phenomenon for Some Papers in Chinese Medical Journals

The authors collected the numbers of citations and downloads from 2005 to 2009 of papers in five Chinese general ophthalmological journals: Recent Advances in Ophthalmology, Chinese Ophthalmic Research, Ophthalmology in China, Journal of Clinical Ophthalmology and Chinese Journal of Practical Ophthalmology, published in 2005 from the Chinese Academic Journals Full-text Database and the Chinese Citation Database in Chinese National Knowledge Infrastructure (CNKI) to determine the correlation between download and citation and the peak time of download frequency (DF). The citations from 2000 to 2009 of papers published in 2000 were collected to determine the peak time of citation frequency (CF) of medical papers. There is a highly positive correlation between DF and CF ( r = 4.91, P = 0.000).