Mass spectrometry in IgG4-related disease diagnosis.

We compared liquid chromatography tandem mass spectrometry (LC-MS/MS) against Binding Site immunonephelometry (BSIN) with regards to these methods' abilities to diagnose IgG4-related disease (IgG4-RD). IgG subclasses were gathered from laboratory from December 2011 to December 2020. The IgG4-RD positive and negative patients were diagnosed according to the ACR/EULAR classification criteria by extensive chart review. Both methods' results were compared in terms of test characteristics. For BSIN, there were 43 IgG4-RD positive cases and 174 disease negative cases, while for LC-MS/MS, there were 102 IgG4-RD positive cases and 562 disease negative cases. The majority of IgG4-RD patients by BSIN and LC-MS/MS had an elevated IgG4 level, 81% and 86%, respectively. For BSIN, the ROC curve, cut-off value of 1.25 g/L, had a sensitivity of 81% and a specificity of 84%. For LC-MS/MS, the ROC curve, cut-off value of 1.25 g/L, had a sensitivity of 86% and a specificity of 84%. The responder index score to IgG4 level r-correlation value for BSIN and LC-MS/MS was 0.5 and 0.6, respectively. In our center, LC-MS/MS and BSIN are equivalent test methods in IgG4-RD diagnosis. IgG4 level does correlate with disease activity by the responder index. LC-MS/MS is a valid and equally reliable alternative to BSIN in the diagnosis of IgG4-related disease.

Quality Assessment of Online Resources for the Most Common Cancers.

The internet is a common source of health information for patients with cancer. Despite research surrounding the quality of online resources for individual types of cancer, these results may not necessarily be easily extrapolated to cancer resources as a whole. Thus, we aim to use a standardized tool to produce generalizable results by analyzing the quality of online resources for the most common cancers. Educational websites pertaining to breast, lung, prostate, and colorectal cancers were searched using multiple search engines. After screening against pre-specified inclusion criteria, the most visible 100 websites for each cancer were extracted for analysis. A validated tool was then used to assess their quality. Pooled results were evaluated using descriptive and inferential statistics. Of the 400 analyzed websites, 43% were commercially affiliated, and these were significantly associated with greater use of biased language. Thirty percent of websites disclosed authorship, 47% cited at least one reliable source, and 43% were updated within the last 2 years. The average Flesch-Kincaid readability was determined to be at a grade 10.9 level, which is significantly more difficult than the recommended grade 6 level. Risk factors, symptoms, and detection were the most accurately covered topics. However, most websites did not cover prognosis. This study comprehensively examines the quality of online cancer resources for the four most common cancers. Our results could help guide the development of future resources, support patient education endeavors, and raise awareness among healthcare providers about the limitations of online cancer resources.

The Past and Present of Breast Cancer Resources: A Re-evaluation of the Quality of Online Resources After Eight Years.

Background and objective The internet has become a major resource of information for cancer patients. However, the quality of these resources is variable, and a better understanding is needed to guide physicians as to how to best support patients in their online searches. We previously evaluated the quality of online breast cancer resources in 2011. Nearly a decade later, we aimed to assess the present quality of online breast cancer-related information and to compare our current analysis with data collected in 2011. Methods A list of 100 breast cancer websites was systematically compiled using meta-search engines Yippy and Dogpile and the search engine Google using the search term "breast cancer". Content accuracy and quality markers, including authorship, attribu-tion, currency, site organization, and readability were assessed by using a previously validated standardized rating tool. Results were analyzed using descriptive statistics and Fisher's exact test. The same strategy was used in both 2011 and 2019. Results When comparing 2011 data to the current one, 27% of websites had been updated in the previous two years in 2011 compared to 65% in 2019 (p<0.00001). Both data sets remained similar in terms of website disclosures and objectivity. Only 30% of websites analyzed in 2019 used two or more reliable sources, while 63% had no reliable sources or no sources cited. From 2011 to 2019, resources with readability above grade 12 increased from 4% to 30% (p<0.0001), while websites offering educational support rose from 8% to 35% (p<0.0001). In 2019, treatment and etiology/risk factors were the most accurately covered areas (64% and 63% of websites, respectively). In 2011, 63% of websites were found to be globally accurate. Prognosis coverage increased from 18% to 33% from 2011 to 2019 (p=0.02). In 2019, survivorship was also evaluated and found to be covered in only 24% of resources. Conclusion Over the past eight years, there have been variable changes in the quality of online breast cancer resources. Promisingly, websites are being updated more frequently and the educational support offered is expanding. Furthermore, there has been significant improvement in the coverage of prognosis, although this requires further progress. Unfortunately, websites are becoming increasingly challenging to understand for the average patient, and coverage of survivorship is lacking. Our study provides vital information to healthcare providers on these trends in online breast cancer resources and how to best support patients in their internet searches.