I had a chance meeting today with a rogainer who has recently turned 75, but is still a fine athlete. He (I’ll give that much away) still has the audacity to beat me from time to time. He was asking when we are going to have an over 75 category in our rogaines. I am not sure how serious he was, but it set me to thinking about the subject.

I maintain the membership stats and I have known for some time that the average age of rogainers was increasing but I had not really done any structured analysis until now. (It was a good time to analyse rogaining data because there are a million other things I should actually be doing.) In NSW we have been fortunate to have pretty good stats since 1994 (co-incidentally the year of my first event). Thanks to Graeme Cooper for his early computerisation of rogaining.

I have pulled out the ages of partcipants at all Paddy Pallin events since 1994 and the graph looks like this.

Since 1994 the average age of partipants at the Paddy Pallin rogaines has increased from 33.3 years in 1994 to 42.1 years in 2000. So in 26 years the average age of rogainers has increased by a bit under 9 years. Not only has the average age increased but the stanadard deviation of partcipant ages has also increased. In 1994 the standard deviation was 9.8 years but last year it was 17.3 years. To try an put that in human speak:

It is pleasing to see that rogaining, as a sport is capturing a broader spectrum of ages. The next question that came to mind was “Are we getting more older participants in the Paddy Pallin events?” The mean and standard deviation suggest this but “show me the numbers”.

Here is a graph of the percentage of Paddy Pallin Partcipants who are >55,>65 and >75.

I found this graph quite interesting. In the early 90’s less than 5% of participants were over 55 years of age. Last year 26% or participants were over 55.

Having pulled out these stats the next question is why? I think there are several effects:

Changing the subject, it is always interesting to analyse this data by sex.

I always knew the average age of male participants was older than women by a year or so, but what it interesting is the slight divergence in the average ages of men and women over time. I would think these lines cannot continue to diverge like this.

This next graph is interesting, but off topic, and that is the % of partcipants who are female.

Female rogainers are definitely increasing in number and if the trendline is right male and female partcipants will be equal in number by 2038.

The other point to note, before I conclude, is that the Paddy Pallin events generally attract more participants and more younger participnts that other events, but I will save that graph for another time, when I also have heaps of work to do.

I wasn’t planning to write a thesis on rogaining statistics through the ages but let me conclude with three observations:

  1. Rogainers are, on average, getting older;
  2. There are not enough 75+ partcipants to warrant their own category at this time;
  3. I am not a statistician, but if you are and you’re laughing at my analysis, let me know gently.

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