Navigation Links
Wayne State study shows early research on cellphone conversations likely overestimated crash risk
Date:12/14/2011

DETROIT -- A Wayne State University study published in the January 2012 issue of the journal Epidemiology points out that two influential early studies of cellphone use and crash risk may have overestimated the relative risk of conversation on cellphones while driving.

In this new study, Richard Young, Ph.D., professor of research in Wayne State University's Department of Psychiatry and Behavioral Neurosciences in the School of Medicine, examined possible bias in a 1997 Canadian study and a 2005 Australian study. These earlier studies used cellphone billing records of people who had been in a crash and compared their cellphone use just before the crash to the same time period the day (or week) before the control window.

Young said the issue with these studies is that people may not have been driving during the entire control window period, as assumed by the earlier study investigators.

"Earlier case-crossover studies likely overestimated the relative risk for cellphone conversations while driving by implicitly assuming that driving during a control window was full time when it may have been only part time," said Young. "This false assumption makes it seem like cellphone conversation is a bigger crash risk than it really is."

In Young's new study, his research team used Global Positioning Satellite (GPS) data to track day-to-day driving of more than 400 drivers during a 100-day period. He then divided the days into pairs, with the first day representing the "control" day and the second day representing the "crash" day in the earlier studies. Overall, the team found little driving consistency in any given clock time period between the two days driving time on the control day was only about one-fourth of the driving time on the crash day, during any specific clock time period.

"This underestimation of the amount of driving in the control windows by nearly four times could reduce cellphone conversation time in that control period," Young said. "It makes it appear that there is less cellphone conversation in control periods than in the time just before a crash, making the relative risk estimate appear greater than it really is."

Young found that when the cellphone conversation time in the control window was adjusted for the amount of driving, the amount of cellphone usage in the control window was about the same as in the minutes before a crash. He concluded that the crash risk for cellphone conversation while driving is one-fourth of what was claimed in previous studies, or near that of normal baseline driving.

Young added that many well-controlled studies with real driving show that the primary increase in crash risk from portable electronic devices comes from tasks that require drivers to look at the device or operate it with their hands, such as texting while driving. Five other recent real-world studies concur with his conclusion that the crash risk from cellular conversations is not greater than that of driving with no conversation.

"Tasks that take a driver's eyes off the road or hands off the steering wheel are what increase crash risk," said Young. "Texting, emailing, manual dialing and so forth not conversation are what increase the risk of crashes while driving."

The National Transportation Safety Board has recommended that all 50 states and the District of Columbia ban the non-emergency use of portable electronic devices for all drivers. Young said this recommendation goes beyond the data from newer studies, including his, because it would ban cellphone conversations while driving.

"Recent real-world studies show that cellphone conversations do not increase crash risk beyond that of normal driving it is the visual-manual tasks that take the eyes off the road and the hands off the wheel that are the real risk," said Young.


'/>"/>
Contact: Julie O'Connor
julie.oconnor@wayne.edu
734-748-4207
Wayne State University - Office of the Vice President for Research
Source:Eurekalert

Related medicine news :

1. Community Health Systems, Inc.s Wayne T. Smith and Larry Cash Named Americas Top Healthcare CEO and CFO
2. Wayne State University study predicts risk of memory loss in healthy, older adults
3. Speaking the same language means better health care quality, Wayne State University study finds
4. Wayne State University researchers publish results settling multiple sclerosis debate
5. Wayne State study links testosterone with mens ability to woo potential mates
6. Wayne State leads study to improve management of cancer pain in African Americans
7. Wayne State researchers find new way to examine major depressive disorder in children
8. Wayne State University researchers win grant from the NSF to target tinnitus
9. Religion benefits traumatic brain injury victims, Wayne State University research finds
10. Health providers should emphasize breast cancer screening, Wayne State University research finds
11. Wayne State University researcher argues that sex reduces genetic variation
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/5/2016)... NY (PRWEB) , ... February 05, 2016 , ... ... partners and setting the stage for new clinical and scientific initiatives have all ... year after she was appointed President and CEO of the nation’s oldest cancer ...
(Date:2/5/2016)... ... February 05, 2016 , ... Freed-Hardeman University President ... have signed a joint enrollment and degree completion agreement. The agreement, which ... baccalaureate degrees at FHU|Dickson. , The agreement allows students to be jointly ...
(Date:2/5/2016)... ... February 05, 2016 , ... The American public tends to feel uncomfortable about ... than regular municipal or well water. The recent experience with lead contaminated water in ... a long way toward increasing public acceptance of recycled waste water as drinking water. ...
(Date:2/5/2016)... ... February 05, 2016 , ... At its annual meeting held last week, ... of the National Board of Directors. Mr. McDermott succeeds former APDA Chairman, Fred Greene. ... Leslie A. Chambers , APDA President and CEO. “Pat has tirelessly served APDA since ...
(Date:2/5/2016)... ... February 05, 2016 , ... In sleep, when the ... a dream. A hallmark feature of patients with eating disorders is significant self-criticism, and ... disorder behaviors and obsessions are regarded as maladaptive means for coping with this unease, ...
Breaking Medicine News(10 mins):
(Date:2/4/2016)... 2016 Worldwide Radiology Oncology surgical robot ... next generation systems provide a way to improve ... surgery. New systems pinpoint the delivery of radiation ... such a problem previously, limiting the quantity of ... cancer surgery far beyond what has been available, ...
(Date:2/4/2016)... Summary Breast cancer, a malignant neoplasm, ... common cancer in women worldwide, accounting for 16% of ... number of women diagnosed with breast cancer has increased ... deaths has declined due to earlier diagnosis and better ... in the past four decades, especially with increasing usage ...
(Date:2/4/2016)... -- Aethlon Medical, Inc. (Nasdaq: AEMD ), the ... life-threatening diseases, today announced results for the third ... --> --> ... last quarterly call, we strategically advanced pre-clinical and ... establish the Aethlon Hemopurifier® as a leading broad-spectrum ...
Breaking Medicine Technology: