Table 2.

Percent weight loss 1 or 2 years after bariatric surgery across different patient characteristics stratified by surgery type

	Bypass				Banding
	% Δ Weight loss at year 1 (n = 245)	p value	% Δ Weight loss at year 2 (n = 211)	p value	% Δ Weight loss at value year 1 (n = 212)	p value	% Δ Weight loss at year 2 (n = 183)	p value
Overall	33.00 ± 8.84		32.43 ±10.16		16.07 ± 8.61		17.56 ± 10.55
BMI at baseline		0.007		0.01		<0.001		<0.001
<40	33.29 ± 8.50		33.75 ± 9.35		19.73 ± 7.78		21.57 ± 8.96
40–45	29.20 ± 6.75		30.34 ± 7.96		12.54 ± 8.29		8.73 ± 10.13
>45	26.46 ± 6.24		23.78 ± 6.31		8.89 ± 4.74		8.52 ± 8.32
Gender		0.06		0.03		0.93		0.80
Male	30.83 ± 10.12		29.33 ± 10.52		15.99 ± 8.93		17.23 ±11.09
Female	33.50 ± 8.46		33.16 ±9.97		16.10 ± 8.49		17.68 ± 10.38
Mean age		0.02		0.63		0.18		0.14
<40 years old	35.04 ± 9.05		33.18 ±9.93		16.54 ± 8.54		16.37 ± 12.12
40–54 years old	32.29 ± 8.54		32.34 ± 10.51		16.95 ± 8.55		19.48 ±9.19
55+ years old	30.81 ± 8.58		31.20 ± 9.75		14.37 ± 8.65		16.24 ± 10.32
Race
Caucasian (ref)	34.48 ± 8.65		34.17 ± 10.16		16.26 ± 8.64		17.63 ± 10.77
African American	29.77 ± 7.38	<0.001	28.87 ± 8.79	0.002	13.31 ± 8.22	0.11	14.79 ± 10.92	0.25
Hispanic	31.79 ± 10.18	0.13	30.19 ± 10.41	0.07	17.58 ± 9.56	0.53	20.18 ±9.42	0.37
Other	30.04 ± 10.10	0.22	32.96 ± 10.63	0.81	17.25 ± 6.82	0.71	18.57 ± 7.80	0.80
Education		0.81		0.81		0.11		0.07
HS diploma/GED	33.62 ± 7.44		32.12 ±9.61		17.72 ± 9.90		20.76 ±11.93
2-Year college	32.76 ± 8.86		33.17 ± 10.13		14.48 ± 8.11		15.69 ±9.68
4-Year college or more	32.89 ± 9.80		32.30 ± 10.59		16.53 ± 8.24		17.46 ± 10.28
Household income		0.41		0.76		0.18		0.38
$20,000 or less	31.40 ±9.51		31.33 ±9.68		15.76 ± 10.23		17.69 ± 10.51
$20,001–40,000	34.00 ± 9.04		33.31 ± 10.86		15.03 ± 8.07		16.18 ± 12.36
$40,001-$80,000	33.42 ± 8.14		32.46 ± 9.92		14.89 ± 8.47		16.57 ± 10.13
Over $80,000	32.60 ± 8.78		33.13 ±9.74		17.79 ± 8.57		19.30 ± 9.23
Marital status		0.44		0.40		0.09		0.77
Married	32.73 ± 7.87		32.85 ± 32.85		18.24 ± 8.42		18.36 ± 9.93
Divorced/separated	31.49 ± 8.17		32.25 ± 32.25		16.73 ± 8.54		17.57 ± 12.96
Never married	33.57 ± 9.31		34.65 ± 34.65		14.82 ± 8.79		16.88 ± 10.98
Comorbidities
Arthritis	33.42 ± 8.82	0.62	33.92 ±11.58	0.19	15.69 ± 7.46	0.66	17.88 ± 8.69	0.77
Diabetes	29.88 ± 8.24	<0.001	29.54 ± 9.74	0.001	14.73 ± 7.99	0.18	16.14 ±9.59	0.26
Hypertension	32.39 ±9.15	0.16	31.75 ± 10.04	0.24	15.64 ± 7.79	0.44	17.55 ± 10.75	0.99
Asthma	33.34 ± 9.23	0.71	34.42 ± 10.93	0.10	16.55 ± 7.81	0.68	19.65 ± 9.99	0.18
Obstructive sleep	32.71 ± 9.05	0.60	32.97 ± 10.08	0.48	15.54 ± 8.72	0.36	16.69 ± 10.12	0.27
apnea GI/GERD	32.60 ± 8.85	0.46	32.52 ± 10.37	0.91	16.84 ± 8.88	0.14	17.81 ± 10.53	0.72
Depression	32.81 ± 8.89	0.72	33.27 ± 10.89	0.26	15.48 ± 7.87	0.30	16.07 ± 10.39	0.06
Anxiety	32.69 ± 9.85	0.66	34.19 ±11.00	0.08	14.74 ± 7.25	0.05	14.56 ± 9.32	0.003
Back pain	32.49 ± 9.34	0.37	32.63 ± 11.33	0.82	16.36 ± 7.46	0.67	16.62 ±9.11	0.37
Anemia	31.20 ± 7.71	0.21	32.10 ± 10.57	0.82	14.62 ± 9.64	0.30	18.00 ±11.23	0.82
Cardiovascular disease	29.36 ± 9.74	0.10	33.59 ± 8.04	0.65	13.17 ± 8.33	0.10	15.92 ± 10.10	0.49
Other	34.56 ± 10.53	0.38	37.26 ± 12.07	0.15	15.84 ±7.26	0.91	13.86 ± 10.66	0.17
Smoker		0.70		0.06		0.20		0.20
Current	33.95 ± 8.02		34.09 ± 9.34		14.95 ±11.00		9.31 ± 4.55
Former	33.41 ± 9.02		34.19 ±9.93		14.98 ± 8.70		17.54 ± 10.27
Never	32.56 ± 8.82		30.86 ± 10.27		17.11 ± 8.34		18.02 ± 10.91
Alcohol drinking		0.31		0.93		0.49		0.16
Non-high risk drinker	32.76 ± 8.95		32.25 ± 10.26		16.01 ± 8.29		17.13 ± 10.55
High risk drinker	34.41 ± 8.21		32.43 ± 9.76		17.14 ± 10.00		20.27 ± 10.73
Disordered eating at baselinea
Emotional eating		0.55		0.29		0.77		0.80
Score >50	32.64 ± 9.15		31.66 ± 9.48		15.90 ± 9.21		17.81 ± 10.66
Score <50	33.32 ± 8.58		33.13 ± 10.73		16.25 ± 8.16		17.40 ± 10.56
Uncontrollable eating		0.45		0.93		0.48		0.94
Score >50	32.68 ± 8.69		32.47 ± 9.87		15.67 ± 9.00		17.70 ± 10.49
Score <50	33.62 ± 9.02		32.34 ±11.04		16.52 ± 8.16		17.58 ± 10.82
Cognitive restraint		0.65		0.17		0.29		0.04
Score >50	33.22 ± 8.50		33.41 ± 9.85		15.58 ± 8.09		16.37 ± 10.60
Score <50	32.71 ±9.13		31.49 ± 10.49		16.92 ± 9.68		19.70 ± 10.51
Average # of METs burned in a day		0.32		0.76		0.64		0.76
1st Quartile (MET<33)	33.13 ± 8.97		33.14 ± 11.53		16.59 ± 8.15		16.96 ± 10.79
2nd Quartile (MET33.01–34)	33.02 ± 7.08		31.00 ± 8.12		15.32 ± 9.03		18.54 ± 10.72
3rd Quartile (MET34.0–36)	31.44 ± 9.56		32.23 ± 8.42		14.86 ± 7.30		16.53 ± 8.38
4th Quartile (MET>36)	34.66 ±9.13		32.59 ± 11.11		16.78 ± 9.79		18.47 ± 11.76
Difficulty decreasing portion sizeb		<0.001		0.009		<0.0001		0.002
High difficulty	25.18 ± 8.02		27.13 ± 10.77		12.17 ± 6.13		13.55 ± 8.30
Low difficulty	33.24 ± 8.21		33.66 ± 9.06		18.31 ± 8.71		19.51 ± 11.67
Difficulty decreasing fatb		0.05		0.003		0.07		0.14
High difficulty	28.07 ± 7.13		27.35 ±11.27		14.12 ± 6.41		15.86 ± 8.19
Low difficulty	32.92 ± 8.46		33.83 ± 8.87		17.53 ± 8.83		18.44 ± 11.32
Difficulty decreasing carbohydratesb		<0.001		<0.001		0.57		0.45
High difficulty	27.68 ± 8.29		28.17 ± 9.57		16.47 ± 6.91		16.91 ± 9.72
Low difficulty	33.56 ± 8.17		34.61 ± 8.79		17.24 ± 9.08		18.33 ±11.20
Difficulty increasing proteinb		0.74		0.80		1.00		0.64
High difficulty	31.94 ± 7.19		33.73 ± 10.18		17.06 ± 9.46		18.91 ± 9.66
Low difficulty	32.67 ± 8.57		33.07 ± 9.31		17.05 ± 8.55		17.75 ± 10.98

Reporting mean ± SD

^aDisordered eating is categorized as high when the TFEQ-18 disordered eating scores were between 51 and 100 with higher scores indicating more of that behavior

^bParticipants reporting a difficulty of 7 of higher (out of 10) are classified as having high difficulty