Originally Posted by
acidfast7
These ratios are meaningless unless they are adjusted for distance travelled, like an reputable analysis would perform.
Also number of participants, although I guess if you mean total man-miles instead of per-trip average, that's accounted for.
There was an interesting thread a while back discussing the most meaningful way to statistically compare car and bike safety -- by distance or by time is I think the biggest question. Different metrics answer different questions.