Table 1

Number of respondents and response rate by age, Adolescent Health and Lifestyle Survey 1987–1997

Age at survey198719891991199319951997Total
*Data on these respondents were not used in this study, because they did not reach age 14 by the end of the follow up period.
Number of respondents
    12363430395436423*2047
    14185643120582008130113469000
    16196834519122095146913799168
    18220135416851929111614148699
Total63881560605064684309413928914
Response rate (%)
    128382818485*84
    1490908788858487
    1689828787888787
    1886808284868384
Total88848586868586