Baseline characteristics stratified by ethnic origin
| Variable | Whites (n = 352) | South Asians (n = 176) | All (n = 528) | p Value* | Missing values |
|---|---|---|---|---|---|
| All values are mean (SD) or number (%). | |||||
| *Difference between whites and South Asians; †465 (88%) patients had an ECG available, 308 (88%) whites and 157 (89%) South Asians. | |||||
| COPD, chronic obstructive pulmonary disease; CVA, cerebrovascular accident; DBP, diastolic blood pressure; SBP, systolic blood pressure. | |||||
| Demographics | |||||
| Age (years) | 70 (11) | 68 (10.0) | 69 (10.5) | 0.106 | 0 |
| Women | 147 (42%) | 79 (45%) | 226 (43%) | 0.494 | 0 |
| Medical history | |||||
| Heart failure | 44 (13%) | 18 (10%) | 62 (12%) | 0.444 | 0 |
| Angina | 75 (21%) | 47 (27%) | 122 (23%) | 0.165 | 0 |
| Myocardial infarction | 75 (21%) | 36 (20%) | 111 (21%) | 0.821 | 0 |
| Coronary revascularisation | 20 (6%) | 10 (6%) | 30 (6%) | 1.0 | 0 |
| Hypertension | 117 (33%) | 80 (45%) | 197 (37%) | 0.006 | 0 |
| CVA | 37 (11%) | 20 (11%) | 57 (11%) | 0.766 | 0 |
| Diabetes | 62 (18%) | 81 (46%) | 143 (27%) | <0.0001 | 0 |
| COPD | 38 (11%) | 9 (5%) | 47 (9%) | 0.031 | 0 |
| Physical examination | |||||
| Pulse rate (beats/min) | 95 (24.7) | 92 (20.8) | 94 (23.5) | 0.115 | 40 (7.6%) |
| SBP (mm Hg) | 140 (27.5) | 145 (28.4) | 142 (27.9) | 0.063 | 59 (11.2%) |
| DBP (mm Hg) | 83 (17.9) | 83 (18.0) | 83 (17.9) | 0.559 | 58 (11%) |
| Atrial fibrillation | 94 (31)† | 24 (15)† | 118 (25)† | 0.0002 | 63 (12%) |
| QRS duration | 107 (21.7)† | 99 (19.9)† | 104 (21.4)† | 0.0001 | 63 (12%) |
| Biochemical data | |||||
| Sodium (mmol/l) | 137 (4.6) | 137 (4.6) | 137 (4.6) | 0.149 | 1 (0.2%) |
| Potassium (mmol/l) | 4.2 (0.71) | 4.2 (0.64) | 4.2 (0.69) | 0.438 | 1 (0.2%) |
| Creatinine (μmol/l) | 121 (75.8) | 128 (86.3) | 123 (79.4) | 0.657 | 1 (0.2%) |
| Serum glucose (mmol/l) | 8.4 (5.2) | 9.6 (3.7) | 8.8 (4.3) | 0.019 | 96 (8.2%) |
| Haemoglobin (g/l) | |||||
| All | 131 (20) | 125 (22) | 129 (21) | 0.002 | 2 (0.4%) |
| Males | 134 (18) | 131 (22) | 133 (21) | 0.235 | 1 (0.2%) |
| Females | 126 (21) | 117 (20) | 123 (19) | 0.001 | 1 (0.2%) |