Abstract
Crude rates of opium addiction were determined in 1972–1974 in ten communities of Laos, representing eight different ethnic groups and three provinces. In six rural communities, data were obtained by a house-to-house survey, and In four urban communities by opium den registration. Communities raising opium poppy as a cash crop had highest crude rates of addiction (7.0–9.8 addicts per 100 people). Those involved in opium commerce had intermediate rates (4.1–5.5). Where neither opium production nor commerce was present, the communities had the lowest rates of addiction (1.8–2.3).

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