[Incidence and prevalence of inflammatory bowel disease. Asturian study in 5 areas (EIICEA). Spain].
OBJECTIVE
To know and to compare Inflammatory Bowel Disease (IBD) Incidence and Prevalence rates in in five areas of Asturias (Spain). We conducted a prospective epidemiologic study of IBD in the Province of Liege (1 million inhabitants).


METHODS
We conducted a descriptive, populational, collaborative epidemiologic study, retrospective between 1954 and 1993 and prospective between 1994 and 1997. All patients diagnosed according to a standard protocol for case ascertainment and definition of IBD, aged 14 years or more are included, in five areas of Asturias (Spain) (461,965 inhabitants).


RESULTS
For the period 1954 to 1997, 1018 IBD have been diagnosed [565 ulcerative colitis (UC) (55.5%), 415 Crohn's disease (CD) (40.8%) and 38 undefined IBD (IC) (3.7%)]; [482 women (47.2%), 536 males (52.8%)]. In the 4 year-prospective period, 306 cases were collected: 176 UC (57.51%), 110 CD (35.94) and 20 IC (6.53%); UC/CD: 1.6. Without appreciable and significant differences between Frequency of illness groups and sexes. IBD incidence rate (per 100,000 per year) (1954-97) is 5.12 (95% CI = 3.05-7.18) (UC: 2.84; CD: 2.08; IC: 0.19; UC/CD 1.36). In the 4 years- prospective study, IBD incidence rate is 16.55 (95% CI = 12.84-20.25), (UC: 9.52; CD: 5.95; IC: 1.08; UC/CD: 1.6). IBD prevalence rate in 1997 is 205.21 (95% CI = 182.14-227.29), (UC: 109.96; CD: 87.45; IC: 7.79). Comparisons have settled down among the studied areas, without finding differences statistically significant.


CONCLUSIONS
Inflammatory Bowel Disease incidence and prevalence rates of in our region are homogeneous between the cities investigated and superior than those historically reported in Spanish studies. These results were similar to those observed in European studies.
Saro Gismera
C
C
Servicio de Aparato Digestivo, Hospital de Cabueñes, Camino de Cabueñes s/n. 33394 Gijón, Asturias. csarog@meditex.es
Riestra Menéndez
S
S
Milla Crespo
A
A
Sánchez Fernández
R
R
Lacort Fernández
M
M
Argüelles Fernández
G
G
Chovac
Z
Z
Florido Mancheño
J I
JI
Antón Magarzo
J L
JL
Altadill Arregui
A
A
Vizoso
F
F
Pineda García
E
E
Fernández de Ocariz Archs
E
E
Albert Colomer
J
J
García Pérez
J
J
López Rivas
L
L
Lombraña
J L S
JL
D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D015994:Incidence; D015212:Inflammatory Bowel Diseases / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D011446:Prospective Studies; D012189:Retrospective Studies; D013030:Spain