Table 1.

Number of studies according to ICD categories

ICD-10 Category	Disease category	No of studies
A, B	Infectious and parasitical diseases	4
C	Neoplasms (Tumours)	5
E	Endocrine, nutritional and metabolic diseases	8
	Psychological and behavioural disorders
F0	Organical, including symptomatical psychological disorders	4
F1	Psychol. and behav. disorders due to psychotropic substance abuse	22
F3	Affective disorders	13
F4	Neurotic, stress and somatoform disorders	12
F5	Behav. abnormalities with somatic disorders	5
F6	Personality and behavioural disorders	1
F8	Developmental disorders	1
G	Nervous diseases	14
	Diseases of circulatory system
I10/11	High blood pressure	4
I20-I52	Ischemic and other forms of heart disease	21
I6/7	Cerebrovascular and other peripheral vascular diseases	2
J4	Pulmonary diseases	2
K	Digestive diseases	6
L	Diseases of the skin	1
M	Diseases of the muscular skeletal system and of connective tissue	9
N	Diseases of the urogenital system	3
T8	Trauma, intoxications and other consequences of extraneous causes	2
Y4	Extraneous causes of morbidity and mortality	2
	Number of all included studies	N = 141