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Table 1 Descriptive statistics (sample size, mean, standard deviation, minimum, and maximum) for age-at-event and years-between-event variables

From: Transitions in alcohol use over time: a survival analysis

Variable N Mean SD Min Max
Age first drink 1738 16.3 2.9 1 42
Age of first HD 1295 21.1 5.8 12 55
Age of first remission from HD 932 32.0 8.9 17 56
Age of first relapse back to HD 157 37.5 8.2 20 54
Years between first drinking and HD 1293 5.3 5.6 0 38
Years between HD and remission 932 11.5 8.5 0 37
Years between remission and relapse back to HD 157 9.3 6.5 0 31
Age of first AD 641 24.6 7.9 12 54
Age of first remission 524 34.9 9.0 15 56
Age of first relapse 68 37.1 8.5 17 52
Years between first drinking and first AD 640 9.1 7.7 0 46
Years between first AD and first remission 524 11.2 8.1 0 36
Years between first remission and relapse 68 9.1 6.4 0 27
  1. Min minimum, Max maximum; together these two values create the range. HD heavy drinking, quantified as QFI (quantity times frequency of drinking) greater than or equal to 60 drinks a month. AD alcohol dependence. One individual reported that the age of their first drink was at 1-year old, with others reporting other very young ages; missing data on other variables removed most of these participants from subsequent analyses, and age of first drink is not relevant for later transitions for those who do have later HD or AD data