Table 1.

Description of variables and corresponding programs and data derived among youths and adults participating in the accelerometry portion of NHANES 2003–2006.

	Youth	Adults
References	Development of latent classes [1]	Development of latent classes [2]; associations with correlates [5]; associations with mortality [6]
Age	6–17 years	18 years and older
Required wear time	>=3 or 7 days for >=8 h/day from 6:00am to midnight	>=3 or 7 days for >=8 h/day
Average intensity latent class variables	Average counts/minute/day	Average counts/minute/day
Cutpoint definitions for physical activity variables	Using [7]: light 100–2295 counts/min, moderate 2296–4011 counts/min, and vigorous >=4012 counts/min.	Using [8]: light 100–2019 counts/min, moderate 2020–5998 counts/min, and vigorous >=5999 counts/min. Using [9]: light 100–759 counts/min and MVPA >=760 counts/min.
Physical activity latent class variables	1.Percent of light activity out of total wearing time per day; 2.Percent of MVPA out of total wearing time per day; 3.Percent of vigorous activity out of total wearing time per day	1.Percent of MVPA out of total wearing time per day (using both sets of cutpoints [8], [9])
Cutpoint definitions for sedentary behavior variables	Using [7]: sedentary behavior <100 counts/min.	Using [10]: sedentary behavior <100 counts/min. Sedentary bouts were defined as >=30 min with at least 80% of the min falling below the sedentary threshold, allowing for <5 consecutive min above the threshold. The sedentary bout had to start and end with sedentary behavior.
Sedentary behavior latent class variables	1.Percent of sedentary behavior out of total wearing time per day	1.Percent of sedentary behavior out of total wearing time per day; 2.Percent of sedentary bouts out of total wearing time per day
Latent class variables available by strata	Yes for (1) gender; (2) age (6–11, 12–14, 15–17 years); and (3) in or out of school	no
Available through this Data in Brief:
Documentation	Documentation_youth_LCA_macro	Documentation_adult_LCA_macro
SAS program	generate_LCA_Macros_NHANES_Youth.sas	generate_LCA_Macros_NHANES_Adults.sas
Example dataset in SAS to apply the SAS program to the macros	example_youth_cpm.sas7bdat	example_adult_cpm.sas7bdat
Statistics from MPlus output to derive latent class variables	stats_cpm.sas7bdat;	stats_cpm.sas7bdat;
	stats_lt.sas7bdat;	stats_mvcm.sas7bdat;
	stats_mvpa.sas7bdat;	stats_mvto.sas7bdat;
	stats_sd.sas7bdat;	stats_sd.sas7bdat;
	stats_vig.sas7bdat	stats_sdb.sas7bdat
	(plus additional statistics for in or out of school, boys or girls, and age 6–11, 12–14, and 15–17 years

Abbreviations: MVPA, moderate to vigorous physical activity