This appeared a little while ago.
Online 'Symptom Checkers' Often Miss Diagnosis, Study Finds
Computer-generated analysis correctly identified problem about one-third of the time
By Alan Mozes
HealthDay Reporter
THURSDAY, July 9, 2015 (HealthDay News) -- Automated online "symptom checkers" that seem to offer patients a quick opportunity for self-diagnosis provide the right diagnosis in only about one-third of cases, a new analysis reveals.
The study team found that online checkers -- which are typically free services offered by medical schools, insurance companies, and even government entities -- are a more reliable and effective means to get a handle on symptoms than using web search engines such as Google.
The investigation also found that online medical checkers are about as accurate as primary care physician phone services that offer patients advice on whether or not a condition requires urgent care.
"The goal with these symptom checkers is to try and streamline the process by which people search the Internet for information on health problems," explained study lead author Hannah Semigran, a research assistant in the department of health care policy at Harvard Medical School in Boston.
"And we found that they are a better alternative to previous attempts to conduct random searches. Symptom checkers are definitely a more organized and constructive way to go about that," she added.
"We found that they are pretty good at effectively directing people with an (emergency) situation to seek some kind of appropriate care, and to do so quickly," Semigran said. "But these tools are only a helpful piece of the information puzzle. And users should know that they definitely do not provide the final word on their diagnosis."
Semigran and her colleagues reported their research online July 9 in the BMJ. Funding was provided by the U.S. National Institute of Allergy and Infectious Diseases.
To assess the pros and cons of symptom checkers, the study team made a list of symptoms from 45 medical scenarios typically presented to medical students for teaching purposes.
In 2014, those symptoms were input into 23 different English-language online symptom checkers. All were free, available to the public, and variously based in the United States, the United Kingdom, the Netherlands and Poland.
Some sites had multiple-choice symptom lists, while others allowed for users to enter their symptoms manually. These automated systems then generated a ballpark sense of what the user's problem could be, and whether or not the person needed immediate in-person care.
Taken together, the online checkers accurately assessed symptoms on the first attempt in roughly one-third of cases. More than half the time, a correct diagnosis was listed among three top options. And that success rate rose to 58 percent among lists offering 20 options.
What's more, the checkers were judged to be accurate 57 percent of the time when giving advice as to how to handle the symptoms and where to seek care; that figure jumped to 80 percent when faced with critical or urgent situations. The researchers pointed out that performance varied across the symptom checkers.
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SOURCES: Hannah Semigran, B.A., research assistant, department of health care policy, Harvard Medical School, Boston; David Hanauer, M.D., associate professor, department of pediatrics, University of Michigan, Ann Arbor; July 9, 2015, BMJ, online
Last Updated: Jul 9, 2015
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It looks to me that while you may use such sites for trivial issues and for fun it has to be much more sensible to simply go and see your GP for anything you (or your family) are worried about.
Pretty simple I reckon.
David.
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