Table 4.

Step-counting bias estimation in the commercial wearable validation data set.

Modeling approach and covariates		Estimate	SE	95% CI
First day
	Intercept	–90.6	258.8	–612.8 to 431.6
	Age	–1.4	2.9	–7.3 to 4.5
	BMI	4.5	7.0	–9.7 to 18.6
First day with ≥ 1000 steps
	Intercept	59.3	461.4	–879.4 to 998.0
	Age	–1.3	4.7	–10.8 to 8.2
	BMI	–2.4	14.2	–31.2 to 26.5
Both
	Intercept	–39.2	283.8	–604.2 to 525.9
	Age	–1.3	3.2	–7.6 to 5.0
	BMI	2.1	7.8	–13.5 to 17.6