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At least 955 records · Page 53Linked to original sources
PubMed2005

A comparative study of mobile electronic data entry systems for clinical trials data collection.

PURPOSE: To determine the speed, accuracy, ease of use, and user satisfaction of various electronic data entry platforms for use in the collection of mammography clinical trials data. METHOD AND MATERIALS: Four electronic data entry platforms were tested: standalone personal digital assistant (PDA), Tablet PC, digitizer Tablet/PDA Hybrid (DTP Hybrid), and digital pen (d-pen). Standard paper data entry was used as control. Each of five radiologist readers was assigned to enter interpretations for 20 screening mammograms using three out of the five data entry methods. Assistants recorded both start and stop data entry times of the radiologists and the number of help requests made. Data were checked for handwriting recognition accuracy for the d-pen platform using handwriting verification software. A user satisfaction survey was administered at the end of each platform reading session. RESULTS: Tablet PC and d-pen were statistically equivalent to conventional pen and paper in initial data entry speed. Average verification time for d-pen was significantly less than secondary electronic data entry of paper forms (p-value <0.001). The number of errors in handwriting recognition for d-pen was less than secondary electronic data entry of the paper forms data. Users were most satisfied with Tablet PC, d-pen, and conventional pen and paper for data entry. CONCLUSIONS: Tablet PC and d-pen are equally fast and easy-to-use data entry methods that are well tolerated by radiologist users. Handwriting recognition review and correction for the d-pen is significantly faster and more accurate than secondary manual keyboard and mouse data entry.

Clinical Trials as Topic↗
PubMed2006

Social mixing patterns for transmission models of close contact infections: exploring self-evaluation and diary-based data collection through a web-based interface.

Although mixing patterns are crucial in dynamic transmission models of close contact infections, they are largely estimated by intuition. Using a convenience sample (n=73), we tested self-evaluation and prospective diary surveys with a web-based interface, in order to obtain social contact data. The number of recorded contacts was significantly (P<0.01) greater on workdays (18.1) vs. weekend days (12.3) for conversations, and vice versa for touching (5.4 and 7.2 respectively). Mixing was highly assortative with age for both (adults contacting other adults vs. 0- to 5-year-olds, odds ratio 8.9-10.8). Respondents shared a closed environment significantly more often with >20 other adults than with >20 children. The difference in number of contacts per day was non-significant between self-evaluation and diary (P=0.619 for conversations, P=0.125 for touching). We conclude that self-evaluation could yield similar results to diary surveys for general or very recent mixing information. More detailed data could be collected by diary, at little effort to respondents.

Adult↗
PubMed1997

An isolated perfused lung model with real time data collection and analysis of lung function.

Our primary purpose in making this report has been to describe an isolated perfused lung system which permits the real time collection and analysis of lung mechanical functioning. The distinct advantage of our system lies in its capacity for breath by breath data acquisition and analysis. In addition, because of the modular nature of the components, the system can be readily expanded or contracted depending on the type of experiment being conducted. As configured, the lung mechanic parameters of air flow, lung volume, transpulmonary pressure, pulmonary artery pressure, weight, resistance, elastance (inverse of compliance), and positive end expiratory pressure were monitored, recorded, and evaluated simultaneously throughout the experimental period. We present the results of a 3-h study with control lungs illustrating the stability of these measurements throughout the entire period. Also included is a brief discussion of 3-h studies which show a progressive loss of viability in lungs treated with the redox cycler nitrofurantoin.

Animals↗