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Table 2 Mean SF-36 scores by BMI category, and multivariate association between SF-36 sub-optimal scores and obesity.

From: Role of educational level in the relationship between Body Mass Index (BMI) and health-related quality of life (HRQL) among rural Spanish women

 

Overall analysis (n = 1298)

Stratified analysis

      

Primary educationb

Secondary educationc

 

Mean score

 

Suboptimal values

Mean score

 

Suboptimal values

Mean score

 

Suboptimal values

  

p-valuea

n (%)

OR3

95% CI

 

p-valuea

n (%)

OR3

95% CI

 

p-valuea

n (%)

OR3

95% CI

SF-36 BMI Physical functioning

               

Normal

95.3

 

121 (17)

1.00

 

93.0

 

67 (25)

1.00

 

96.7

 

54 (12)

1.00

 

Overweight

89.3

 

155 (38)

1.75

1.26 – 2.42

87.2

 

134 (44)

1.88

1.26 – 2.82

95.5

 

21 (20)

1.40

0.75 – 2.62

Obese

83.0

0.001

97 (51)

1.96

1.30 – 2.96

81.1

0.005

85 (54)

1.97

1.22 – 3.18

91.7

0.508

12 (34)

2.02

0.83 – 4.97

Role-physical

               

Normal

92.5

 

77 (11)

1.00

 

91.3

 

35 (13)

1.00

 

93.3

 

42 (10)

1.00

 

Overweight

86.9

 

72 (18)

1.12

0.75 – 1.67

84.8

 

60 (20)

1.27

0.77 – 2.09

92.8

 

12 (12)

0.78

0.36 – 1.67

Obese

77.1

0.014

55 (29)

1.62

1.02 – 2.58

75.2

0.019

49 (31)

1.81

1.04 – 3.14

85.7

0.954

6 (17)

1.16

0.40 – 3.37

Bodily pain

               

Normal

84.9

 

278 (49)

1.00

 

82.7

 

121 (45)

1.00

 

86.3

 

157 (36)

1.00

 

Overweight

79.2

 

200 (49)

1.04

0.78 – 1.37

77.4

 

157 (52)

1.03

0.72 – 1.48

84.5

 

43 (41)

0.99

0.62 – 1.60

Obese

70.3

0.011

115 (60)

1.29

0.89 – 1.88

68.1

0.015

99 (63)

1.36

0.86 – 2.13

80.0

0.973

16 (46)

1.10

0.51 – 2.36

General health

               

Normal

71.1

 

167 (24)

1.00

 

67.6

 

84 (32)

1.00

 

73.3

 

83 (19)

1.00

 

Overweight

63.0

 

166 (41)

1.35

0.98 – 1.84

60.8

 

139 (46)

1.38

0.93 – 2.03

69.6

 

27 (26)

1.25

0.71 – 2.21

Obese

58.2

0.030

102 (53)

1.65

1.11 – 2.46

55.8

0.083

92 (59)

1.76

1.10 – 2.81

69.1

0.796

10 (29)

0.96

0.38 – 2.43

Vitality

               

Normal

68.1

 

94 (13)

1.00

 

66.8

 

43 (16)

1.00

 

68.9

 

51 (12)

1.00

 

Overweight

64.7

 

81 (20)

1.16

0.79 – 1.70

63.7

 

68 (22)

1.24

0.77 – 2.01

67.8

 

13 (13)

0.97

0.46 – 2.04

Obese

58.2

0.043

57 (30)

1.45

0.91 – 2.29

56.7

0.038

50 (32)

1.51

0.88 – 2.60

64.9

0.732

7 (20)

1.48

0.54 – 4.02

Social functioning

               

Normal

92.9

 

151 (22)

1.00

 

91.6

 

59 (22)

1.00

 

93.7

 

92 (21)

1.00

 

Overweight

90.5

 

113 (28)

1.11

0.80 – 1.55

90.0

 

83 (27)

1.10

0.72 – 1.69

91.9

 

30 (29)

1.24

0.73 – 2.14

Obese

88.7

0.464

68 (35)

1.27

0.84 – 1.92

87.8

0.512

59 (38)

1.40

0.86 – 2.29

92.9

0.723

9 (26)

0.84

0.34 – 2.05

Role-emotional

               

Normal

96.0

 

46 (7)

1.00

 

95.9

 

19 (7)

1.00

 

96.0

 

27 (6)

1.00

 

Overweight

93.0

 

46 (11)

1.35

0.83 – 2.23

92.2

 

36 (12)

1.53

0.80 – 2.91

95.2

 

10 (10)

1.03

0.42 – 2.51

Obese

88.2

0.172

35 (18)

1.89

1.07 – 3.35

86.2

0.039

32 (20)

2.52

1.27 – 5.03

97.1

0.259

3 (9)

0.82

0.19 – 3.51

Mental health

               

Normal

75.0

 

195 (28)

1.00

 

73.2

 

74 (28)

1.00

 

76.0

 

121 (28)

1.00

 

Overweight

73.1

 

135 (33)

1.04

0.76 – 1.42

72.1

 

102 (34)

1.09

0.72 – 1.65

75.8

 

33 (32)

1.06

0.63 – 1.77

Obese

70.5

0.176

75 (39)

0.99

0.66 – 1.48

69.2

0.355

64 (41)

1.10

0.68 – 1.80

76.7

0.299

11 (31)

0.84

0.36 – 1.93

  1. General results and stratified analysis by educational group.
  2. aTest for trend adjusted for age, residential area, work status, education, smoking habit, daily number of hours of sleep and number of chronic diseases, alcohol consumption, sedentary leisure time
  3. bn Normal (BMI < 25 Kg/m 3 ) = 266; overweight (BMI ≥ 25 Kg/m 3 < 30 Kg/m) = 303; obese (BMI ≥ 30 Kg/m 3 ) = 157
  4. cn Normal (BMI < 25 Kg/m 3 ) = 433; overweight (BMI ≥ 25 Kg/m 3 < 30 Kg/m) = 104; obese (BMI ≥ 30 Kg/m 3 ) = 35
  5. OR adjusted for age, area, work status, education, smoking habit, daily number of hours of sleep and number of chronic diseases, alcohol consumption, sedentary leisure time