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BCA Membership Demographics Report 2020, Lecture notes of Demography

This report, published by the British Caving Association (BCA) in 2020, provides an analysis of the age and sex composition of the BCA membership. The data was collected from the membership database and categorized into Club Individual Members (CIMs) and Direct Individual Members (DIMs). The report highlights the increasing participation of young women relative to men and the aging population of cavers. It also includes a population pyramid of BCA membership and discusses the potential factors influencing the growth of BCA membership.

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BCA Demographics Report
2020
Publications & Information
Author: R. Namaghi with special thanks to A. Morgan, K. Easton
Introduction & Aims
The purpose of this report is to accurately reflect the age and sex composition of the BCA
membership of the BCA. It will form the basis of a reference model for demographic reports to
accompany surveys. This will help in determining how reflective a sample is of the membership.
This is a follow up report to one Tim Allen and Kay Easton wrote in 2017. The findings of this report
confirm the previous findings of an old membership profile, even relative to that of the UK
population. It also confirms that participation among young women is increasing relative to men.
Method
The data was collected on 03/12/2020 from the membership database, anonymised and then sent
to Publications and Information Officer. The data was transferred to an Excel spreadsheet and
simple statistical tests carried out as per previous iterations of the report. Club individual members
(CIMs) and Direct Individual Members (DIMs) were subcategorized.
Incomplete records were noted in order to aid in our understanding of how incomplete the database
is.
Results
Results Per Membership Category
Category
CIM
DIM
Total
Total Records
782
7075
Complete Records (%)
3252 (51.7%)
62 (7.9%)
3614 (51.1%)
Sex data (%)
5371 (85.3%)
72 (9.2%)
-
Age Data (%)
3256
(51.7%)
696 (89.0%)
-
Records with no
demographics
875
77
952
Male:Female Ratio
73.9:26.1
79.8:20.2
75.3:24.7
Female Mean Age
(Years)
-
-
4
0
.6
Male Mean Age
(Years)
-
-
4
8
.6
Mean Age (Years)
46.7
49.4
47.2
Median Age (Years)
48
51
49
The prevalence of BCA members in the UK population is 4.8 per 100,000, with the numbers being 7.3
and 2.4 for Males and Females respectively.
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BCA Demographics Report

Publications & Information

Author: R. Namaghi with special thanks to A. Morgan, K. Easton

Introduction & Aims

The purpose of this report is to accurately reflect the age and sex composition of the BCA membership of the BCA. It will form the basis of a reference model for demographic reports to accompany surveys. This will help in determining how reflective a sample is of the membership. This is a follow up report to one Tim Allen and Kay Easton wrote in 2017. The findings of this report confirm the previous findings of an old membership profile, even relative to that of the UK population. It also confirms that participation among young women is increasing relative to men.

Method

The data was collected on 03/12/2020 from the membership database, anonymised and then sent to Publications and Information Officer. The data was transferred to an Excel spreadsheet and simple statistical tests carried out as per previous iterations of the report. Club individual members (CIMs) and Direct Individual Members (DIMs) were subcategorized. Incomplete records were noted in order to aid in our understanding of how incomplete the database is.

Results

Results Per Membership Category Category CIM DIM Total Total Records 6293 782 7075 Complete Records (%) 3252 (51.7%) 62 (7.9%) 3614 (51.1%) Sex data (%) 5371 (85.3%) 72 (9.2%) - Age Data (%) 3256 (51.7%) 696 (89.0%) - Records with no demographics

Male:Female Ratio 73.9:26.1 79.8:20.2 75.3:24. Female Mean Age (Years)

Male Mean Age (Years)

Mean Age (Years) 46.7 49.4 47. Median Age (Years) 48 51 49 The prevalence of BCA members in the UK population is 4.8 per 100,000, with the numbers being 7. and 2.4 for Males and Females respectively.

Population Structure of the BCA Membership

Population Pyramid of all complete records

For reference this is cavers per 100,000 of the 2018 ONS population projection estimate by age group. *the 100+ Demographic is omitted as it would heavily skew the graph. 0- 10- 20- 30- 40- 50- 60- 70- 80- 90- 100+ Numbers of members (Gridlines are at intervals of 50) Age Brackets (in 5 year bands) Population Pyramid of BCA Membership Female Male 0- 10- 20- 30- 40- 50- 60- 70- 80- 90- 100+ Numbers of members (Gridlines are at intervals of 5 per 100,000) Age Brackets (in 5 year bands) BCA Members per 100,000 UK Population Female Male

Recommendations The following has been implemented during the writing of the report:  The IT group is to investigate the high number of loss of sex data for DIMs. It may be due to a user interface issue. The following are to be implemented:  Surveys are to collect demographic data and produce an analysis of how representative/how well we have listened to a targeted demographic. Setting a standard to meet will only be possible once we have established a decent dataset and have a good appreciation of our capabilities.  That this report be reproduced in early December 2021 (To be published in January 2022) and at least annually after that as part of the P&I group.  That further investigation into past data sources to determine long-term trends be continued. This will be much more possible once covid restrictions have been lifted and the British Caving Library can be visited far more easily.  Conduct further studies with the following questions that need to be answered:

  • How much does the early thirties drop rebound naturally?
  • Will our 70+ generation rapidly expand in the next 10-20 years? (and what are the potential challenges of that?)
  • Are women an increasing proportion of the sport? (i.e. Are there structural issues that can be addressed to remove barriers to participation and are we monitoring to ensure increasing female participation is sustained) -How long do people stay in caving? i.e. a follow up study to R. Mehew’s work in 2017. Other points to consider:  GDPR advice to clubs on complete records  The re-implementation of BCA Online is a good opportunity to repair the database.  Consideration of other categories like ethnicity data for the database would be prudent.

Appendix

1.1 Tim Allen’s June 2017 report

Age demographic report of BCA membership to June 2017 Council Meeting. It is of concern that there appear to be less active cavers about. It is noticeable in the once hotspot areas of the Yorkshire Dales for instance. BCA pointed to the relative consistency of annual membership renewals, so what could be happening here? Perhaps the membership is ageing and becoming less active. If older members leave and are not replaced my sufficient numbers of younger cavers this can have consequences for BCA in achieving less income and fewer ‘human’ resources to take on the roles of running the organisation. I suggested BCA collect ‘date of birth’ data at membership renewal to find the age demographic of the current membership. Council decided it could only ask for ‘year of birth’ (YOB) on a voluntary basis. That data has been passed on to me and with some input from a retired statistician I am able to offer the following report. 2270 members returned credible YOB data out of a total of 4942. A small number of entries were removed from the sample which gave ages over life expectancy or were not actually a YOB. The sample size is adequate. The question is whether it is representative of the membership. There may be age bias in whether members chose to respond to the request for YOB. Never the less it is all we have to go on. There are considerably more members in their 50s than in their 20s and 30s. The median age is 49 – nearly half the membership is 50 or over. 18% of the membership is over 65. The BCA has an ‘old’ population. Overall BCA membership numbers are likely to fall unless 20 and 30 year olds can be increased by around 40%. Tim Allen