The Conversation.com has done some interesting anaylsis regarding how genre has an impact on the life expectancy of musicians.
[M]usicians who are dying youngest belong to newer genres (electronic, punk, metal,rap,hip-hop) that have not existed as long as genres such as jazz, country, gospel and blues. Consequently, they have not had the same opportunity to live a full lifespan.
However, this is not the whole answer. (Continue reading)