Which of these prostate gland, family, body type and sex risk factors did you have?

Don't take this too seriously - it's just an epidemiological study from NSW, OZ. It attracted my attention because I could not believe the sex categories (in a lifetime? in a month?). So, FWIW, here are the risk factors they identified and their relative weight:

Paternal history of PC - 2.3
History of prostatitis - 2.3
BPH -2.3
Obese - 1.4 or Overweight - 1.3
≥7 sex partners in a lifetime - 2.0
≥5 orgasms/month at time of Dx -1.6
Puberty started later than peers - 0.8

Adult body size, sexual history and adolescent sexual development, may predict risk of developing prostate cancer

For each risk factor you had (assign "1" to the risk factors you don't have), multiply the numbers together. So for example, if your father had PC and your puberty started at age 18, your risk score would be 2.3 x 0.8 = 1.8. The highest risk score would be 54.5; the lowest risk score would be 0.8. There is no science behind this - I'm making it up because it's raining and they've asked folks in LA to stay off the roads so I can't drive to the gym.

I'll arbitrarily divide it into these 5 categories:

2.4 or less
2.5-5.5
5.6-12.4
12.5-19.9
20.0-54.5

I take it you're not much of a TV fan

81GyGuy-

I wouldn't put much faith in this. The evidence here is flimsy because it was based on memory and doesn't correct for PSA screening, which has an overwhelming effect. In the largest prospective tracking study, the Health Professionals Tracking Study, which doesn't rely on memory, they found the opposite association for ejaculation frequency - men who ejaculated more throughout adult life were less likely to have prostate cancer.

www.europeanurology.com/article/S0302-2838(16)00377-8/abstract/ejaculation-frequency-and-risk-of-prostate-cancer-updated-results-with-an-additional-decade-of-follow-up

Men who had problems related to prostatitis or BPH, are much more likely to have PSA tests - if they have PC, it will more likely be discovered. Therefore the incidence of PC will necessarily be much higher among such men. In the following studies, where everyone got the same PSA testing, prostatitis was associated with a reduced risk of PC:

Baseline prostate inflammation is associated with a reduced risk of prostate cancer in men undergoing repeat prostate biopsy: Results from the REDUCE study

Chronic Inflammation in Prostate Biopsy Cores is an Independent Factor that Lowers the Risk of Prostate Cancer Detection and is Inversely Associated with the Number of Positive Cores in Patients Elected to a First Biopsy

They also did not stratify according to low risk PC vs aggressive PC, which can lead to different conclusions.

Most importantly, association is not causation - very important to keep in mind when there is no clear link between cause and effect.