TABLE 3.

Comparison of study groups in health care use and costs by the bootstrap method

Variables	Mean DID (intervention – control)		95% CI of DID
	By original dataset	By bootstrap	Lower	Upper
Health care use for 6 months before and after intervention
911 calls	0.00	0.00	0.00	0.00
Ambulance use	0.00	0.00	0.00	0.00
Emergency department visits	0.10	0.10	−0.05	0.21
Urgent care visits	0.00	0.00	0.00	0.00
Hospitalizations	−0.02	−0.02	− 0.16	0.08
Nonstudy outpatient visits	0.29	0.26	0.01	0.48
Per patient costs, $
Total costs	−503	−490	−2,805	833
Trial staff for intervention/control	150	153	124	178
Nonstudy health care use	−281	−279	−1,923	1994
Strip test use	−101	−101	−291	82
Pump use	−23	−24	−221	319
Continuous glucose monitoring use	−182	−185	−424	−32

Note. CI, confidence interval; DID, difference-in-difference.