Table 1

Categorical patient characteristics at HF diagnosis in each cohort

Factor level	2001/2 cohort		2011/12 cohort
Factor level	Frequency	Per cent	Frequency	Per cent
All patients
Total	5981	100.0	12 830	100.0
Sex
Male	2959	49.5	6623	51.6
Female	3022	50.5	6207	48.4
Age group in diagnosis year
<45	57	1.0	162	1.3
45–64	716	12.0	1684	13.1
65–74	1324	22.1	2487	19.4
75–84	2383	39.8	4357	34.0
85+	1501	25.1	4140	32.3
IMD 2010 quintile
1 (least deprived)	967	16.2	2471	19.3
2	1399	23.4	3026	23.6
3	1252	20.9	2711	21.1
4	1214	20.3	2513	19.6
5 (most deprived)	1130	18.9	2101	16.4
Unknown	19	0.3	8	0.1
HES ethnicity
White	5037	84.2	12 251	95.5
Non-white	105	1.8	392	3.1
Unknown	839	14.0	187	1.5
Source of first HF recording
GP consultation (CPRD)	3027	50.6	3955	30.8
Hospital admission (HES)	2954	49.4	8875	69.2
No of comorbidities
0	904	15.1	677	5.3
1	1689	28.2	1822	14.2
2	1560	26.1	2929	22.8
3	1046	17.5	2965	23.1
4+	782	13.1	4437	34.6
Electronic Frailty Index category
Fit	1597	26.7	1755	13.7
Mild frailty	3109	52.0	5837	45.5
Moderate frailty	1127	18.8	4296	33.5
Severe frailty	148	2.5	942	7.3
Smoking category (non, ex or current)
Non-smoker	626	10.5	5073	39.5
Ex-smoker	422	7.1	4830	37.6
Current smoker	1893	31.7	2105	16.4
Unknown	3040	50.8	822	6.4
Alcohol drinking group
Non drinker	232	3.9	2445	19.1
Light, moderate or unspecified	1675	28.0	4703	36.7
Heavy or alcoholic	237	4.0	730	5.7
Unknown	3837	64.2	4952	38.6
BMI group
Underweight	95	1.6	354	2.8
Normal	910	15.2	3137	24.5
Overweight	1100	18.4	3440	26.8
Obese	836	14.0	3334	26.0
Unknown	3040	50.8	2565	20.0
Diabetes status
No diabetes	4999	83.6	9805	76.4
Type 1 diabetes	378	6.3	732	5.7
Type 2 diabetes	604	10.1	2293	17.9

BMI, body mass index; CPRD, Clinical Practice Research Datalink; GP, general practitioner; HES, Hospital Episode Statistics; HF, heart failure; IMD, Index of Multiple Deprivation.