Table 1.
Prevalence ratios with 95% confidence intervals (CI) for use of secondary prevention medication for CHD by age and social class in 2000 and 2003
| MYOCARDIAL INFARCTION CASES* | ANGINA ONLY CASES | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| YEAR | 2000 (N = 332) | 2003 (N = 336) | 2000 (N = 485) | 2003 (N = 521) | ||||||||
| Use of medication by age | ||||||||||||
| N | n (%) | Prevalence ratio (95% CI) |
N | n (%) | Prevalence ratio (95% CI) |
N | n (%) | Prevalence ratio (95% CI) |
N | n (%) | Prevalence ratio (95% CI) |
|
| Aspirin Younger Older |
173 159 |
142 (82) 130 (82) |
1.00 0.99 (0.90, 1.10) |
185 151 |
161 (87) 122 (81) |
1.00 0.93 (0.84, 1.02) |
238 247 |
161 (68) 157 (64) |
1.00 0.94 (0.82, 1.07) |
288 233 |
201 (70) 170 (73) |
1.00 1.04 (0.94, 1.16) |
| Statins Younger Older |
173 159 |
75 (43) 28 (18) |
1.00 0.40 (0.28, 0.59) |
185 151 |
146 (79) 73 (48) |
1.00 0.61 (0.51, 0.73) |
238 247 |
61 (26) 39 (16) |
1.00 0.62 (0.43, 0.88) |
288 233 |
165 (57) 92 (39) |
1.00 0.69 (0.57, 0.83) |
| ACE inhibitors Younger Older |
173 159 |
43 (25) 49 (31) |
1.00 1.24 (0.87, 1.75) |
185 151 |
85 (46) 62 (41) |
1.00 0.89 (0.69, 1.14) |
238 247 |
40 (17) 41 (17) |
1.00 0.98 (0.66, 1.47) |
288 233 |
88 (31) 67 (29) |
1.00 0.94 (0.72, 1.23) |
| Beta blockers Younger Older |
173 159 |
70 (40) 48 (30) |
1.00 0.75 (0.55, 1.00) |
185 151 |
93 (50) 54 (36) |
1.00 0.71 (0.55, 0.92) |
238 247 |
80 (34) 63 (26) |
1.00 0.76 (0.57, 1.00) |
288 233 |
117 (41) 73 (31) |
1.00 0.77 (0.61, 0.97) |
| Use of medication by social class | ||||||||||||
| N | n (%) |
Prevalence ratio (95% CI) |
N | n (%) |
Prevalence ratio (95% CI) |
N | n (%) |
Prevalence ratio (95% CI) |
N | n (%) |
Prevalence ratio (95% CI) |
|
| Aspirin Non-manual Manual |
138 181 |
117 (85) 143 (79) |
1.00 0.93 (0.84, 1.03) |
143 180 |
122 (85) 149 (83) |
1.00 0.97 (0.88, 1.06) |
202 272 |
139 (69) 171 (63) |
1.00 0.91 (0.80, 1.04) |
241 264 |
178 (74) 182 (69) |
1.00 0.93 (0.84, 1.04) |
| Statins Non-manual Manual |
138 181 |
40 (29) 57 (31) |
1.00 1.08 (0.77, 1.52) |
143 180 |
86 (60) 124 (69) |
1.00 1.14 (0.97, 1.35) |
202 272 |
52 (26) 45 (17) |
1.00 0.64 (0.45, 0.91) |
241 264 |
123 (51) 123 (47) |
1.00 0.91 (0.76, 1.09) |
| ACE inhibitors Non-manual Manual |
138 181 |
35 (25) 54 (30) |
1.00 1.17 (0.81, 1.69) |
143 180 |
64 (45) 79 (44) |
1.00 0.98 (0.76, 1.25) |
202 272 |
40 (20) 39 (14) |
1.00 0.72 (0.48, 1.08) |
241 264 |
81 (34) 70 (27) |
1.00 0.78 (0.60, 1.03) |
| Beta blockers Non-manual Manual |
138 181 |
56 (41) 54 (30) |
1.00 0.73 (0.54, 0.99) |
143 180 |
67 (47) 76 (42) |
1.00 0.90 (0.71, 1.15) |
202 272 |
59 (29) 79 (29) |
1.00 0.99 (0.75, 1.32) |
241 264 |
83 (34) 98 (37) |
1.00 1.07 (0.85, 1.36) |
*
Myocardial infarction cases include those with or without angina;
N – total in each category; n – prevalence of medication use for each category