Table 3. Risk control interventions including medical and diving practices; number (n) and percentage shown; IHD – ischaemic heart disease; nr – not recorded; ∗ of those questioned about this .
| Intervention | IHD | Arrhythmia | Septal defect | Cardiac, | Hypertension | Diabetes | Asthma | Pneumothorax | Total |
| (n = 31) | (n = 20) | (n = 31) | (other n = 10) | (n = 127) | (n = 25) | (n = 40) | (n = 5) | (n = 289) | |
| Medication | 22 (71) | 15 (75) | 1 (3) | 2 (20) | 93 (73) | 23 (92) | 15 (38) | nr | 151 (56) |
| Surgery | 19 (61) | 1 (5) | 25 (81) | 0 (0) | nr | nr | nr | nr | 45 (49)∗ |
| Diving changes | 10 (32) | 7 (35) | 20 (65) | nr | nr | 16 (64) | 7 (18) | 2 (40) | 62 (47)∗ |
| Consult dive doctor | 8 (25) | 13 (65) | 23 (74) | nr | 32 (25) | 12 (48) | 37 (93) | 2 (40) | 127 (49)∗ |