Primary Analysis Sample		Subgroup Samplea
	Weight Gain Group n = 325	Nonweight Gain Groupb n = 1,195	Weight Gain Group n = 134	Nonweight Gain Groupb n = 646
Inpatient admissions
Patients with an inpatient admission, % (n)	8.3 (27)	7.4 (89)	9.0 (12)	6.0 (39)
Number of inpatient admissions, mean [SD]	0.1 [0.4]	0.1 [0.4]	0.1 [0.5]	0.1 [0.3]
Inpatient expenditures, mean [SD]	$2,676 [$12,066]	$2,046 [$10,204]	$3,852 [$16,388]	$1,405 [$7,510]
Emergency room visits
Patients with an ER visit, % (n)	8.0 (26)	7.9 (95)	6.0 (8)	8.7 (56)
Number of ER visits, mean [SD]	0.1 [0.5]	0.1 [0.4]	0.1 [0.6]	0.1 [0.4]
ER expenditures, mean [SD]	$77 [$439]	$75 [$414]	$47 [$316]	$76 [$402]
Outpatient office visits and services
Patients with outpatient services, % (n)	98.8 (321)	98.6 (1,178)	98.5 (132)	98.6 (637)
Number of outpatient services, mean [SD]	16.9 [13.6]	16.7 [14.0]	16.6 [15.1]	16.5 [12.0]
Outpatient services expenditures, mean [SD]	$1,406 [$2,643]	$1,597 [$6,934]	$1,176 [$1,855]	$1,585 [$8,754]
Pharmacy
Number of prescription claims, mean [SD]	11.0 [7.7]	10.0 [6.9]	10.7 [7.2]	10.1 [6.9]
Prescription drug expenditures, mean [SD]	$1,134 [$1,408]	$1,272 [$1,470]	$1,217 [$1,611]	$1,296 [$1,560]
Total cost of health care services
Mean [SD]	$5,293 [$12,536]	$4,990 [$13,694]	$6,292 [$16,702]	$4,362 [$12,477]
Median	$1,949	$1,953	$1,897	$1,885

^a Sample restricted to patients with BMI ≥ 30 and no evidence of previous cardiovascular disease.

^b Weight gain = increase in weight by > 3%; nonweight gain = weight gain ≤ 3% and weight loss.

BMI = body mass index; ER = emergency room; SD = standard deviation.