A bibliometric analysis in the fields of preventive medicine, occupational and environmental medicine, epidemiology, and public health

Table 3 Data regarding the worldwide research production in the "Public Health" subcategory.

	1995	1996	1997	1998	1999	2000	2001	2002	2003	Total number of articles for the whole period	Percentage of worldwide production (articles)	Mean impact factor of all articles	Total product for the whole period *	Total product/gross domestic product †	Total product/millions of population
USA	840	919	852	1,021	950	1,196	1,252	1,195	1,307	9,532	60.6	1.7	16,254	21.2	57.9
Canada	33	43	50	44	58	45	46	47	71	437	2.8	1.4	629	10.4	20.7
Western Europe	353	367	367	400	395	518	611	505	618	4,134	26.3	1.1	4,651	5.2	12.0
Japan	6	7	11	11	19	9	12	14	14	103	0.7	1.2	126	0.2	1.0
Oceania	28	28	30	37	42	57	36	61	111	430	2.7	1.7	711	15.2	23.5
Asia	31	40	34	52	62	63	85	91	91	549	3.5	1.4	753	2.3	0.2
Eastern Europe	3	5	3	10	6	15	15	21	24	102	0.7	1.2	125	1.3	0.3
Central and Latin America	11	16	10	15	19	18	23	17	34	163	1.0	1.6	265	1.6	0.5
Africa	17	21	22	22	27	24	52	38	55	278	1.8	1.6	457	9.3	0.6
TOTAL (or average)	1,322	1,446	1,379	1,612	1,578	1,945	2,132	1,989	2,325	15,728	-	-	-	(8.2)	-

* Defined as the product of articles multiplied by the corresponding impact factor of their journal
† Total product (defined by the number of articles multiplied by the impact factor of the journal) divided by gross domestic product in tens of trillions of 1995 US dollars

ISSN: 1471-2458