Arbyn M, Dedeurwaerder M, Miakala M, Bikangi N, Boelaert M
Médecins sans Frontières, Brussels, Belgium.
Ann Soc Belg Med Trop. 1995 Jun;75(2):115-24.
Six anthropometric surveys using a random cluster sampling design have been organised in the capital of Zaire between November 1991 and March 1994. The prevalence of acute malnutrition fluctuated with the seasons and followed the cyclic movements of food prices on the market. The general tendency was rising. In March '94, 10.7% (95% confidence interval: 8.8-12.9%) of the children was suffering of acute malnutrition. Nevertheless, the standardised prevalence remained stable. This may suggest that the most disadvantaged living at certain poor zones of the city disconnected, while the rest of the population could still manage to maintain their nutritional status. The hypothesis of increasing heterogeneity is supported by the raising of the design-effect.
1991年11月至1994年3月期间，在扎伊尔首都组织了6次采用随机整群抽样设计的人体测量调查。急性营养不良的患病率随季节波动，并跟随市场上食品价格的周期性变动。总体趋势呈上升态势。1994年3月，10.7%（95%置信区间：8.8 - 12.9%）的儿童患有急性营养不良。然而，标准化患病率保持稳定。这可能表明，生活在城市某些贫困且与世隔绝地区的最弱势群体出现这种情况，而其余人口仍能设法维持其营养状况。设计效应的提高支持了异质性增加的假设。
