Supplemental Table 3.

Summary Statistics Comparison: Missing and Nonmissing Costs^a

Variable	Missing Values		Nonmissing Values
	n	Mean	n	Mean
Year 1
Age	25	69.16	447	65.75
BMI	23	27.29	423	27.85
Gender	25	80%	447	79%
Never smoked	6	24%	145	32%
Previous smoker	13	52%	239	53%
Current smoker	6	24%	63	14%
ECG result	24	8%	447	22%
Celecoxib	25	52%	447	50%
Diabetes	24	13%	442	9%
History	23	52%	444	33%
Year 2
Age	30	68.57	442	65.75
BMI	28	26.91	418	27.88
Gender	30	80%	442	79%
Never smoked	7	23%	144	33%
Previous smoker	19	63%	223	53%
Current smoker	4	13%	65	15%
ECG result	29	14%	442	22%
Celecoxib	30	47%	442	50%
Diabetes	29	10%	442	9%
History	28	39%	439	34%
Year 3
Age	47	68.09	425	65.69
BMI	45	27.15	401	27.89
Gender	47	74%	425	80%
Never smoked	11	23%	140	33%
Previous smoker	26	55%	226	53%
Current smoker	10	21%	59	14%
ECG result	46	11%	425	23%
Celecoxib	47	43%	425	50%
Diabetes	46	7%	425	9%
History	45	42%	422	33%

Abbreviations: BMI = body mass index; ECG = electrocardiography.

^aPatient gender (female = 0; male = 1); ECG result (normal = 1; abnormal = 0); Celecoxib (placebo arm = 0; treatment arm = 1); history (no history of NMIBC = 0; history of NMIBC = 1); diabetes (no diabetes = 0; diabetes = 1).