Table 1

Factors influencing statin usage among IHD diagnosed patients aged 35–84 in 1998 (n = 30 448)

VariableNumberr%OR95% CIAdjusted OR95% CI*
*Adjusted for all other variables in table and practice (except region, which is not adjusted for practice).
†The number of practices in each region is shown in parentheses.
ACORN, a classification of residential neighbourhoods; CI, confidence interval; IHD, ischaemic heart disease; OR, odds ratio.
Age range (years)
35–4439516441.50.910.74 to 1.110.900.73 to 1.12
45–542418117048.41.201.09 to 1.321.181.07 to 1.30
55–646387279843.811
65–7411334373433.00.630.59 to 0.670.640.60 to 0.69
75–849901103010.40.150.14 to 0.160.160.15 to 0.18
Sex
Female12495293623.511
Male17940596033.21.621.54 to 1.711.061.00 to 1.13
Regional Health Authority
Anglia & Oxford (21)†4275128029.91.010.93 to 1.100.940.86 to 1.03
North Thames (15)257075329.30.980.89 to 1.080.980.88 to 1.10
North West (8)210165231.01.060.95 to 1.181.000.89 to 1.13
North & Yorkshire (20)5807151226.00.830.77 to 0.900.820.75 to 0.89
Scotland (1)623150.02.361.43 to 3.902.601.49 to 4.53
South Thames (16)279098535.31.291.17 to 1.421.321.19 to 1.46
South & West (31)6423191029.711
Trent (16)3903110228.20.930.85 to 1.020.930.84 to 1.02
Wales (4)105926925.40.810.69 to 0.930.860.73 to 1.02
West Midlands (10)144540227.80.910.80 to 1.030.890.77 to 1.02
Type
Non-specific IHD317476023.91.131.04 to 1.241.121.01 to 1.24
Angina15445335921.811
Myocardial infarction9094324835.72.001.89 to 2.121.961.84 to 2.09
Revascularisation2722152956.24.614.24 to 5.023.923.57 to 4.31
Time since diagnosis
0–1 years6273248439.62.582.41 to 2.762.192.02 to 2.37
1–3 years7594264934.92.111.97 to 2.251.921.79 to 2.07
3–5 years5438150527.71.501.40 to 1.621.311.20 to 1.42
>5 years11130225820.311
ACORN
Thriving6468208032.211
Expanding220273333.31.050.95 to 1.170.950.84 to 1.08
Rising92623225.10.710.60 to 0.830.840.69 to 1.03
Settling5684162428.60.840.78 to 0.910.930.84 to 1.02
Aspiring324085226.30.750.69 to 0.830.810.72 to 0.91
Striving3881107827.80.810.74 to 0.890.750.66 to 0.84
No ACORN score8034229728.60.850.79 to 0.910.980.83 to 1.15
Smoking status
Never10871301427.711
Former11075356932.21.251.18 to 1.321.060.99 to 1.14
Current5124168032.81.261.17 to 1.360.900.83 to 0.98
Not recorded336563318.80.600.55 to 0.670.720.64 to 0.80