Obesity and Multisite Pain in the Lower Limbs: Data from the Osteoarthritis Initiative
Table 1
The demographic characteristics of the study participants according to their body mass index.
Characteristics
All (N = 4,661) Mean ± SD
Normal weight (n = 1,068)
Overweight (n = 1,832)
Obese (n = 1,761)
Age (years)
61.3 ± 9.1
61.8 ± 9.5
62.2 ± 9.3
60.0 ± 8.6
<0.001
BMI (Kg/m2)
27.9 ± 2.0
22.8 ± 1.5
27.4 ± 1.4
33.7 ± 3.1
<0.001
n (%)
n (%)
n (%)
n (%)
Sex
<0.001
Male
1,942 (41.7)
338 (31.6)
888 (48.5)
716 (40.7)
Female
2,719 (58.3)
730 (68.4)
944 (51.5)
1,045 (59.3)
Race
<0.001
Caucasian
3.669 (78.7)
950 (89)
1,508 (82.3)
1,211 (68.8)
African Americans/Asians/others
992 (21.3)
118 (11)
324 (17.7)
550 (31.2)
Educational status
<0.001
Primary school or less
167 (3.6)
9 (1)
71 (3.9)
87 (4.9)
High school or more
4,494 (96.4)
1,059 (99)
1,761 (96.1)
1,674 (95.1)
Marital status
<0.001
Married
3,074 (66)
736 (68.8)
1,258 (68.7)
1,080 (61.3)
Unmarried/divorced/widowed
1,587 (34)
332 (31.2)
574 (31.3)
681 (38.7)
Employment status
0.026
Employed
2,883 (61.9)
639 (59.8)
1,112 (60.7)
1,132 (64.3)
Not employed
1,778 (38.1)
429 (40.2)
720 (39.3)
629 (35.7)
Income status
<0.001
≥$50,000/year
2,912 (62.5)
720 (67.4)
1,179 (64.4)
1,013 (57.5)
<$50,000/year
1,749 (37.5)
348 (32.6)
653 (35.6)
748 (42.5)
Charlson comorbidity index
<0.001
0
3,442 (73.8)
857 (80.2)
1,407 (76.8)
1,178 (66.7)
≥1
1,219 (26.2)
211 (19.8)
425 (23.2)
583 (33.1)
Depressive symptoms
0.001
CESD <16
4,188 (89.8)
971 (90.9)
1,672 (91.3)
1,545 (87.7)
CESD ≥16
473 (10.2)
97 (9.1)
160 (8.7)
216 (12.3)
Values are presented as means ± standard deviation (SD). Pearson’s chi-squared test, post hoc test, or analysis of variance (ANOVA) test was used to determine values. Values are presented as number (percent). BMI, body mass index; $, the United States dollar; CESD, Center for Epidemiological Studies Depression.
