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Politics : A US National Health Care System?
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To: Lane3 who wrote (7692)7/23/2009 10:14:27 AM
From: i-node  Read Replies (1) of 42652
 

It can't. It's unfeasible. There's no way to know the time of onset. If there's no data point, you can't track it. The closest you could get would be the onset of symptoms. And, with many cancers, by the time you have symptoms, you usually have had it for a long time and may be already circling the drain.

I think you CAN track it. You can draw inferences based on samples of those persons for whom you DO have early detection data. For example, there are people who get chest X-rays annually (me, for example), women who get annual mammograms, screening colonoscopies, prostate exams, etc. You can infer from those samples what the consequences of early detection are.

The onset of symptoms of lung cancer can be pretty violent. But doctors routinely identify questionable areas on X-ray.

I think the science is a lot more complicated than I understand but the statistics are pretty straightforward.
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