失访是指在实验过程中，研究对象可能迁走或因与本病无关的其他原因死亡等。
此外，此类流动服务可以有效减少“失访”病例的数量。
In addition, these mobile services may reduce the number of cases "lost to follow-up".
高危儿管理和社区保健结合可提高管理率，降低失访率。
High risk infants management should combine with community health care to raise management rate and reduce missing rate.
建立有效的临床随访模式是提高随访质量，减少失访率的关键。
It is important to set up an effective model for promoting the level of the quality of follow-up.
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