Table A.1.

Person level sample sizes^* and adjusted R-squares from the minute level linear regressions of steps on the full list of predictors (full model) and on square root of counts only (the reduced model)^**

Gender	Age	total number of respondents	number of respondents with nonmissing steps	Adjusted R2 from Full model	Adjusted R2 from Reduced model
Male	6-7	136	99	0.5633	0.5602
	8-11	268	196	0.6334	0.6276
	12-19	978	712	0.7484	0.7406
	20-39	643	474	0.7559	0.7524
	40-59	572	433	0.7691	0.7572
	60+	729	528	0.7116	0.7021
Female	6-7	145	113	0.5623	0.5576
	8-11	299	238	0.6145	0.6145
	12-19	916	665	0.705	0.6982
	20-39	756	546	0.6861	0.6836
	40-59	608	442	0.6979	0.6818
	60+	749	541	0.6459	0.6378

^*The sample sizes are for the person level records that went into the linear regressions and the multiple imputation procedures.

^**The models were run with minute level records.