| May 72-76 | 0 = Drugs |
| up to 31.12.83 | 1 = Alcohol |
| 2 = Anaesthetic (including induced Hypothermia) | |
| up to 31.12.83 | 3 = Alcohol and Anaesthetic |
| 4 = Pregnancy | |
| 5 = Abortion | |
| 6 = Pregnancy with Anaesthetic and/or Alcohol | |
| 7 = Abortion with Anaesthetic and/or Alcohol | |
| 8 = Cot Death | |
| 9 = Hypothermia | |
| Jan-Aug 73 | A = Mention of low temperature |
| Oct 74-78 | A = Mention of Asthma |
| 1981+ | A = Solvent abuse |
| Nov 74-March 79, 1983+ | B = Mention of influenza |
| 1981+ | B = Haemolytic disease of newborn |
| 1976+ | C = Mention of Mesothelioma |
| 1976+ | D = Mention of Plastic Bag |
| 1977+ | E = Adverse effects of drugs - therapeutic misadventures etc |
| 1977+ | F = Lung conditions |
| 1977-31.12.83 | G = Bladder neoplasms |
| 1978+ | H = Drug dependence and infectious hepatitis |
| 1977+ | J = Electricity |
| 1977-15.5.79 | K = Friedrich's Ataxia |
| 1981-1983 | K = Melanoma |
| 1985+ | K = Use of Rule 3 |
| 1971-31.12.83 | L = Leukaemia |
| 1.5.83+ | M = Subacute Sclerosing Panencephalitis |
| July 1981-31.12.83 | N = Neuroblastoma |
| 1978+ | P = Accelerated registration |
| 1977+ | R = Rule 11 |
| 1977+ | T = Encephalitis |
| 1981+ | V = Tuberculosis with pneumoconiosis/silicosis |
| May 1976+ | W = More than one associated condition |
| 1977-July 1978 | X = Radiation etc |
| 1981+ | X = Industrial disease |
| 1977+ | Y = Sporting activity |
| Blank if no mention of associated condition |
18-Sep-91