; UK Cervical Cancer Incidence Rate Ages 20-24 ; UK Cervical Cancer Vaccination % Ages 20-24

0.3

0.6

0.9

1.2

1.5

1.8

2.1

2.4

2.7

3

3.3

3.6

3.9

4.2

2.2

2.3

2.2

2.4

2.4

2.5

2.7

2.9

3.1

3.2

3.3

3.2

3.3

3.1

3.3

3.1

3.0

4.4%

2.9

17%

3.3

28%

4.1

42%

4.3

57%

4

8

12

16

20

24

28

32

36

40

44

48

52

56

1994

1995

1996

1997

1998

1999

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

2012

2013

2014

The percentage of young women in the 20-24 age bracket who had received the HPV vaccination is estimated from the number of vaccinated women and girls in one-year age brackets at September, 2011. The normal process in the UK is to vaccinate girls when they are 12-13 years old. However, when the process started in 2008 they also decided to vaccinate older girls who were still in school, and the percentage of each school year who were vaccinated was known. Since the so-called ‘catch up’ program had terminated by 2011, we can assume that the rate of vaccination as these girls turned 20 would not have changed significantly. The calculation is therefore based on the age of the young women at each year, increasing as more groups turn 20. Note that since the vaccination groups are based on school years, one-third of the girls turned twenty in a calendar year prior to the remaining two-thirds who would turn 20 in the following year. For example, 2010, was the first year with a significant percentage of 20-24 year olds who had been vaccinated. The percentage of 4.4% is calculated by knowing that 66% of that school year had been vaccinated, but only one-third turned 20 in 2010. Furthermore, 20 year olds only represent 1/5 of the 20-24 monitoring bracket. So, 66% x 1/3 x 1/5 = 4.4%.

*Cervical Cancer incidence statistics*. Cancer Research UK. 2018 Jul [accessed]. https://www.cancerresearchuk.org/health-professional/cancer-statistics/statistics-by-cancer-type/cervical-cancer/incidence*Annual HPV vaccine coverage in England in 2010/2011*. UK Department of Health. 2012 Mar. http://media.dh.gov.uk/network/211/files/2012/03/120319_HPV_UptakeReport2010-11-revised_acc.pdf

- Count = total number of cases of a condition in a year; Rate = number of cases per 100,000 people in a year; Risk = number of one type of case (e.g. death) divided by number of another type (e.g. incidence).
- Incidence = number or rate of new cases in a year; Mortality = number or rate of death from a condition in a year; Prevalence = number or rate or percentage of people who have a certain condition (whether acquired in this year or before).