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Table 1 Characteristics of the participants and prevalence of overweight and obesity, overall and by gender

From: Ten-year trends in overweight and obesity in the adult Portuguese population, 1995 to 2005

 

1995-6

1998-9

2005-6

Test (p-value)

Sample size

38,504

38,688

25,348

 

Women (%)

20,451 (53.1)

20,556 (53.1)

13,322 (52.6)

2.47 (0.30)

Age group (%)

    

   18-24

4,962 (12.9)

4,685 (12.1)

3,222 (12.7)

146.3 (<0.001)

   25-34

5,389 (14.0)

5,722 (14.8)

3,309 (13.1)

 

   35-44

6,319 (16.4)

6,344 (16.4)

3,934 (15.5)

 

   45-54

6,319 (16.4)

6,379 (16.5)

4,249 (16.8)

 

   55-64

6,445 (16.7)

6,122 (15.8)

3,906 (15.4)

 

   65-74

5,567 (14.5)

5,707 (14.8)

3,917 (15.5)

 

   75+

3,503 (9.1)

3,729 (9.6)

2,811 (11.1)

 

Educational level (%)

    

   Primary

28,570 (74.2)

26,682 (69.0)

15,060 (59.4)

1557.3 (<0.001)

   Secondary

7,293 (18.9)

8,787 (22.7)

7,472 (29.5)

 

   University

2,641 (6.9)

3,219 (8.3)

2,816 (11.1)

 

BMI (kg/m2)

    

   Average ± SD

25.2 ± 4.0

25.4 ± 4.1

25.7 ± 4.5

87.9 (<0.001)

   Median (IQR)

24.8 (22.5 - 27.5)

25.0 (22.6 - 27.7)

25.2 (22.6 - 28.1)

 

BMI categories (%)

    

   Normal

20,164 (52.4)

19,420 (50.2)

12,294 (48.5)

202.4 (<0.001)

   Overweight

13,909 (36.1)

14,312 (37.0)

9,233 (36.4)

 

   Obese

4,431 (11.5)

4,956 (12.8)

3,821 (15.1)

 

Men

    

BMI (kg/m2)

    

   Average ± SD

25.4 ± 3.5

25.7 ± 3.7

25.9 ± 4.1

61.8 (<0.001)

   Median (IQR)

25.1 (23.1 - 27.5)

25.4 (23.2 - 27.7)

25.6 (23.3 - 28.3)

 

BMI categories (%)

    

   Normal

8,887 (49.2)

8,358 (46.1)

5,330 (44.3)

138.4 (<0.001)

   Overweight

7,310 (40.5)

7,702 (42.5)

5,006 (41.6)

 

   Obese

1,856 (10.3)

2,072 (11.4)

1,690 (14.1)

 

Women

    

BMI (kg/m2)

    

   Average ± SD

25.0 ± 4.4

25.2 ± 4.5

25.4 ± 4.8

32.8 (<0.001)

   Median (IQR)

24.4 (21.9 - 27.5)

24.7 (22.0 - 27.9)

24.8 (22.0 - 28.1)

 

BMI categories (%)

    

   Normal

11,277 (55.1)

11,062 (53.8)

6,964 (52.3)

80.18 (<0.001)

   Overweight

6,599 (32.3)

6,610 (32.2)

4,227 (31.7)

 

   Obese

2,575 (12.6)

2,884 (14.0)

2,131 (16.0)

 
  1. Obesity was defined as a body mass index ≥30 kg/m2. Results are expressed as number of participants and (percentage) or as mean ± standard deviation. IQR: interquartile range. Statistical analysis by chi-square or analysis of variance.
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