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| | The association between antihypertensive drugs and glioma |
 | | The recorded information of each drug includes the Anatomical Therapeutic Chemical (ATC) code (WHO, 1990), the dispensing date, the quantity of the drug, the prescribed daily dose, and the estimated duration of use. |
 | | As glioma is not a separate code in the ICD-9-CM, all patients with a brain tumour (ICD-9-CM code 191) in the LMR database were linked to the Dutch nationwide network and registry of histo- and cytopathology (PALGA) containing data of histological, cytological and autopsy examinations of all 16 million inhabitants in the Netherlands. |
 | | After stratification for ATC classes, none of the other risk estimates reached statistical significance, although numbers were small in some of the exposure categories (Table 2). |
| www.nature.com /bjc/journal/v94/n5/full/6603000a.html (2823 words) |
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