Gareaballah E T, Loevinsohn B P
Bull World Health Organ. 1989;67(6):669-74.
Estimates of measles vaccination coverage in the Sudan vary on average by 23 percentage points, depending on whether or not information supplied by mothers who have lost their children's vaccination cards is included. To determine the accuracy of mother's reports, we collected data during four large coverage surveys in which illiterate mothers with vaccination cards were asked about their children's vaccination status and their answers were compared with the information given on the cards. Mothers' replies were very accurate. For example, for measles vaccination, the data supplied were both sensitive (87%) and specific (79%) compared with those on the vaccination cards. For both DPT and measles vaccination, accurate estimates of the true coverage rates could therefore be obtained by relying solely on mothers' reports. Within +/- 1 month, 78% of the women knew the age at which their children had received their first dose of poliovaccine. Ignoring mothers' reports of their children's vaccination status could therefore result in serious underestimates of the true vaccination coverage. A simple method of dealing with the problem posed by lost vaccination cards during coverage surveys is also suggested.
苏丹麻疹疫苗接种覆盖率的估计值平均相差23个百分点，这取决于是否纳入了那些孩子疫苗接种卡丢失的母亲所提供的信息。为了确定母亲报告的准确性，我们在四次大型覆盖率调查中收集了数据，在这些调查中，我们询问了持有疫苗接种卡的文盲母亲其孩子的疫苗接种状况，并将她们的回答与接种卡上的信息进行了比较。母亲们的回答非常准确。例如，对于麻疹疫苗接种，与接种卡上的数据相比，所提供的数据既敏感（87%）又具特异性（79%）。因此，对于百白破疫苗和麻疹疫苗接种，仅依靠母亲们的报告就能获得对真实覆盖率的准确估计。在正负1个月内，78%的女性知道她们的孩子接种第一剂脊髓灰质炎疫苗的年龄。因此，忽视母亲们关于其孩子疫苗接种状况的报告会导致严重低估真实的疫苗接种覆盖率。文中还提出了一种在覆盖率调查中处理疫苗接种卡丢失问题的简单方法。
