Understanding the Determinants of Weight-Related Quality of Life among Bariatric Surgery Candidates
Table 1
Characteristics of the study population by gender.
Men ()
Women ()
Mean
SD
Mean
SD
Physiological variables
Age (years)
43
8.9
38
10.2
Weight (kg)
159
35.5
136*
19.0
Height (m)
1.78
0.07
1.64*
0.07
BMI (kg/m2)
50
9.8
51
6.7
Hip (cm)
140
19.2
147
12.7
Waist (cm)
148
18.0
135*
14.5
Waist-to-hip ratio
1.06
0.07
0.92*
0.08
VO2peak (mL/kg/min)(fair = 38 for males, 31 for females)
16.2
(4.9)
14.4
(2.9)
VO2peak (L/min)
2.58
0.78
1.96*
0.39
VO2 at rest (L/min)
0.42
0.10
0.33*
0.06
PaO2 at rest (mmHg) [99]
83
11.3
91*
9.8
Functional status
6MWT (M)
429
110.5
414
83.3
SF-36 (0–100)
Physical functioning [86]
32
27.8
43
24.2
Role physical [82]
49
41.0
47
41.9
Bodily pain [76]
52
28.4
45
23.9
GHP [77]
43
13.8
41
19.5
Vitality [66]
39
13.1
36
16.1
Social functioning [86]
58
26.1
57
29.0
Role emotional [84]
59
44.9
64
40.4
MH [78]
63
17.5
60
19.4
PCS [51]
35
11.3
33
9.8
MCS [52]
44
9.8
44
9.9
Weight-related quality of life (0–100)
IWQOL overall
55
24.7
40*
21.3
Public distress
56
37.3
37*
20.5
Physical function
45
25.0
36
16.1
Self-esteem
49
29.1
24*
25.6
Sexual life
46
21.0
35
28.7
Work
45
22.9
36
22.6
Abbreviations: BMI, body mass index; 6MWT, 6-minute walk test; MCS, mental component summary; PCS, physical component summary; MHI, Mental Health Index; GHP, general health perception; IWQOL, impact of weight on quality of life—lite. The parentheses in italic are norms for the SF-36 [36], and for PaO2 [42]. For VO2peak (mL/kg/min) the classification of “fair” is the 40th percentile value for age and gender from the American College of Sports Medicine [43]. Statistical difference between men and women, *P value <0.05, **P value <0.0001.
