O/E ratios for the 10 most prevalent morbidity dyads and triads
| Number of chronic conditions | Rank | Chronic conditions | O/E ratio |
| 2 | 1 | Chronic lung diseases and asthma | 162.15 |
| 2 | Emotional, nervous, or psychiatric problems and memory-related disease | 97.73 | |
| 3 | dyslipidaemia and diabetes or high blood sugar | 38.39 | |
| 4 | Heart disease and memory-related disease | 25.69 | |
| 5 | Stroke and memory-related disease | 23.66 | |
| 6 | Hypertension and stroke | 22.85 | |
| 7 | Hypertension and diabetes or high blood sugar | 20.64 | |
| 8 | Cancer or malignant tumour and stroke | 19.55 | |
| 9 | Memory-related disease and asthma | 19.55 | |
| 10 | Stroke and asthma | 19.55 | |
| 3 | 1 | Stroke, emotional, nervous, or psychiatric problems and memory-related disease | 10 287.72 |
| 2 | Emotional, nervous, or psychiatric problems, memory-related disease and asthma | 8498.56 | |
| 3 | Emotional, nervous, or psychiatric problems, chronic lung diseases and asthma | 2274.26 | |
| 4 | Heart disease, stroke and memory-related disease | 2253.50 | |
| 5 | Chronic lung diseases, heart disease and asthma | 1992.69 | |
| 6 | Dyslipidaemia, heart disease and memory-related disease | 1443.25 | |
| 7 | Hypertension, dyslipidaemia and diabetes or high blood sugar | 1398.31 | |
| 8 | Hypertension, stroke and memory-related disease | 1387.35 | |
| 9 | Chronic lung diseases, memory-related disease and asthma | 1376.53 | |
| 10 | Chronic lung diseases, arthritis or rheumatism and asthma | 1265.95 |
O/E, observed-to-expected.