So Now You Know

Captain Kirk's Enterprise had (or will have) a crew of 430. In the three years it was on the air, 59 crewmembers were killed during the mission, 13.7% of the crew.

Consider*:

* Yellow-shirt crewperson deaths: 6 (10%)
* Blue-Shirt crewperson deaths: 5 (9%)
* Engineering smock crewperson deaths: 4 (7%)
* Red-Shirt crewperson deaths: 43 (74%)

What causes a red-shirted crewman to die?

* On-board incident - 42.5%
* Beaming down to the planet - 57.5%

There were also many fights during the mission; on the Enterprise, on planets, and various space stations. The fights were also divided between alien races or crazed crewmen (usually wearing red shirts).

* There were 130 fights over 80 episodes.
* 18 of the 130 fights resulted in a fatality.
* 13 of the 18 fatal fights resulted in a red-shirt fatality.

What was the rate of red-shirt casualties?

* 18 red-shirt fatality episodes:
* 8 multiple fatality occurrences; involving 34 red-shirted crewmen.
* 9 single red-shirt fatality situations.

It was found that red-shirted crewmembers tended to die in groups. In 17 red-shirt fatality episodes, 8 were multiple incidents, 9 were single incidents. In a little less than 50% of the fatal red-shirt situations, multiple crewmen were vaporized.
* not sure why these total to 58 compared to the assertion that 59 died - not my analysis :^)
Source and much more trekie statistical goodness