Participation, response rates and break-off rates.
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aThe response rate (known as AAPOR RR1 [29]) is calculated as the number of complete interviews divided by the number of invitations. bThe break-off rate is calculated as the number of people who dropped off during the survey divided by the number of people who started. Participation, response rates and break-off rates.
创建时间：
2015-06-10
