Table 1.
Variable | CPRD (n=11 302) | DIN (n=3462) |
---|---|---|
Age at diagnosis (years) | ||
18–55 | 5.3% (602) | NA |
56–65 | 23.3% (2631) | NA |
66–75 | 37.4% (4228) | NA |
75 and above | 33.9% (3841) | NA |
Gender | ||
Male | 55.3% (6247) | 47.4% (1641) |
Female | 44.7% (5055) | 52.6% (1821) |
Smoking | ||
Current | 14.7% (1665) | 19.1% (661) |
Ex-smoker | 43.9% (4962) | 27.2% (941) |
Never smoked | 34.2% (3864) | 51.8% (1792) |
Missing | 7.2% (811) | 1.9% (68) |
Deprivation (IMD 2004 quintiles)* | ||
1 (most deprived) | 17.8% (2012) | 9.6% (333) |
2 | 19.9% (2253) | 14.9% (517) |
3 | 21% (2375) | 19.2% (664) |
4 | 23.1% (2613) | 22.0% (760) |
5 (least deprived) | 18.1% (2049) | 26.4% (915) |
Missing | 0% (0) | 7.9% (273) |
Year of diagnosis | ||
1997–1998 | 5.8% (658) | 12.1% (420) |
1999–2000 | 8.8% (996) | 15.8% (546) |
2001–2002 | 16.4% (1856) | 20.6% (714) |
2003–2004 | 29.2% (3303) | 25.1% (870) |
2005–2006 | 39.7% (4489) | 26.3% (912) |
Medications (N) | ||
0–4 | 14.9% (1681) | 16.9% (586) |
5–9 | 29.4% (3319) | 38.1% (1318) |
10–14 | 28.2% (3188) | 24.4% (845) |
15–19 | 8.5% (956) | 9.6% (332) |
20 and above | 19.1% (2158) | 7.8% (269) |
Missing | 0% (0) | 3.2 (112) |
Prescribed β-blocker | ||
No | 64.3% (7272) | 59.4% (2057) |
Yes | 35.7% (4030) | 40.6% (1405) |
Type of β-blocker | ||
Atenolol | 73.0% (2943) | 75.2% (1057) |
Propranolol | 11.0% (443) | 12.8% (180) |
Other β-blocker | 16.0% (644) | 12.0% (168) |
*Based on patient postcode for DIN and practice postcode for CPRD.
CPRD, Clinical Practice Research Datalink; DIN, Doctors’ Independent Network; NA, not available.