S. Issaragrisil et al., APLASTIC-ANEMIA IN RURAL THAILAND - ITS ASSOCIATION WITH GRAIN FARMING AND AGRICULTURAL PESTICIDE EXPOSURE, American journal of public health, 87(9), 1997, pp. 1551-1554
Objectives. A population-based cage-control study was conducted to elu
cidate the incidence and etiology of aplastic anemia in Thailand. Meth
ods. Case patients and hospital control patients:were enrolled in thre
e regions from 1989 to 1994; data were collected by interview. Results
. Forty-six percent of 81 case patients and 19% of 295 control patient
s from Khonkaen were grain farmers (estimated relative risk [RR] = 2.7
, 95% confidence interval [CI] = 1.4, 5.2). Sixteen percent of case pa
tients and 6% of control patients used agricultural pesticides (estima
ted RR = 2.7, 95% CI = 1.1, 6.6). The association with grain farming r
emained among those not exposed to pesticides. In Songkla, 16% of 43 c
ase patients and 2% of 181 control patients were grain farmers (crude
RR estimate = 11, 95% CI = 3.4, 35). Conclusions. The relation. of apl
astic anemia to grain farming may partly explain the high incidence of
aplastic anemia in Thailand.