Total Mean age (SD) % Male % White % Black % Hispanic % Response Rate
NSDUH              
  1997   8731 14.9 (1.9) 49.4 50.6 17.2 26.6 78.3
  1998   7880 15.0 (2.0) 49.9 45.0 20.9 27.6 77.0
  1999 21197 14.9 (1.9) 50.4 67.2 13.4 13.5 61.4
  2000 21982 14.9 (1.9) 50.7 66.8 13.5 13.9 68.6
  2001 19854 14.9 (2.0) 50.4 66.9 13.3 13.2 67.4
  2002 20106 14.8 (2.0) 50.9 66.5 13.5 13.8 71.3
  2003 20834 14.9 (2.0) 51.5 63.0 14.2 14.7 70.7
  2004 20980 14.9 (2.0) 50.9 63.9 13.4 14.4 70.1
  2005 21241 14.9 (1.9) 50.5 62.1 13.7 16.0 69.8
  2006 20838 15.0 (1.9) 51.2 60.8 14.1 16.6 68.4
NLSY97              
  1997 8984 14.4(1.5) 51.2 49.6 26.2 10.9 91.6
  1998 8386 16.0(1.4) 51.1 49.3 26.5 10.9 93.3*
Note: NSDUH: the National Survey on Drug Use and Health, NLSY97: the National Longitudinal Survey of Youth 1997. The cross-sectional 1997 NSDUH data were used for estimating probabilities of smoking behavior transitions with the Probabilistic Discrete Event System (PDES) method; the longitudinal NLSY97 data with baseline data collected in 1997 and followed up data collected in 1998 were used to estimate transitional probabilities for the same smoking behavior transitions; and a comparison of the two sets of transitions provided evidence assessing the validity of the PDES method. The 10-year NSDUH data were used to estimate smoking behavior transitions for US youth 12-17 years of age by the validated PDES method.
*: One-year follow-up rate of the NLSY97.
Table 1: Characteristics of the Study Samples from the 1997-2006 National Survey on Drug Use and Health and the 1997 National Longitudinal Survey of Youth 1997.