Table 4. Distribution of patients across age groups, categorised by sex and patient appearance in the high-cost drugs (HCD) dataset.

Age group	In HCD dataset		Not in HCD dataset
	Number in each age group	% of total in each age group	Number in each age group	% of total in each age group
Females
Total	101,596	NA	11,623,335	NA
0-9	2,437	2.4%	1,244,818	10.7%
10-19	3,235	3.2%	1,282,360	11.0%
20-29	4,736	4.7%	1,459,202	12.6%
30-39	9,125	9.0%	1,617,461	13.9%
40-49	13,200	13.0%	1,468,794	12.6%
50-59	18,547	18.3%	1,570566	13.5%
60-69	18,897	18.6%	1,251,879	10.8%
70-79	19,338	19.0%	1,042,945	9.0%
80-89	10,163	10.0%	545,253	4.7%
90+	1,918	1.9%	140,057	1.2%
Males
Total	96,061	NA	11,640,791	NA
0-9	3,109	3.2%	1,311,321	11.3%
10-19	3,883	4.0%	1,348,521	11.6%
20-29	4,012	4.2%	1,474,829	12.7%
30-39	7,461	7.8%	1,669,359	14.3%
40-49	10,323	10.7%	1,563,269	13.4%
50-59	15,606	16.2%	1,624,034	14.0%
60-69	18,688	19.5%	1,229,951	10.6%
70-79	21,559	22.4%	944,582	8.1%
80-89	10,221	10.6%	408,320	3.5%
90+	1,199	1.2%	66,605	0.6%