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Table 1 Characteristics of study sample and respondents by study year and sex

From: Change in the symptom profile treated as asthma – two cross-sectional studies twenty years apart

ECRHS I 1993/94
Response rate, %
 Mean age of respondents, years30.330.130.2
SOHOS 2014/15
Response rate, %
 Mean age of respondents, years33.032.032.6
  1. Excluded = have moved abroad, unable to answer, or died; Absolute Response Rate = Participated/Sample; Adjusted Response Rate = Participated/(Sample–Excluded)