Table 1.

Demographic and socioeconomic characteristics of the sample at baseline and 5-year relative weight change^a (n = 9222 women and n = 3629 men)

	Women % or mean (SD)	Men % or mean (SD)	P-value2
5-year weight change (%)	1.2 (6.9)	0.6 (5.8)	< 0.0001
BMI classes			< 0.0001
Normal (< 25 kg/m2)	73.1	54.2
Overweight (< 30- ≥ 25 kg/m2)	18.6	36.4
Obese (≥30 kg/m2)	8.3	9.4
Education			< 0.0001
Primary	2.9	3.9
Secondary	32.9	35.7
Under-graduate	32.4	22.2
Post-graduate	31.8	38.2
Occupation			< 0.0001
Never employed	3.0	1.1
Self-employed	2.5	4.2
Manual worker, office worker	30.4	14.3
Intermediate profession	31.5	24.3
Managerial staff	32.6	56.1
Monthly household income per household unit			< 0.0001
Unwilling to answer	9.7	4.7
< 1200 euros	13.0	9.5
1200–1800 euros	39.7	36.4
1801–2700 euros	9.6	11.8
> 2700 euros	28.0	37.6
Age			< 0.0001
18–24 years	3.0	1.2
25–34 years	14.0	7.6
35–54 years	44.3	31.1
> 55 years	38.7	60.1
Household composition			< 0.0001
Single	17.7	13.5
Couple without child	39.9	53.6
Couple with ≥one child	31.9	24.0
Household without child and with ≥3 adults	10.5	8.9
Physical activity level			< 0.0001
Low	31.9	45.3
Moderate	45.7	38.2
High	22.4	16.5
Smoking status			< 0.0001
Never-smoker	53.6	41.2
Former smoker	34.3	48.5
Current smoker	12.1	10.3
Dieting to lose weight			< 0.0001
Never dieter	17.9	32.1
Former dieter	70.6	61.5
Current dieter	11.5	6.4

²P-value represented the overall significance of each variable (Type 3 analysis of effects)

^a5-year relative weight change between 2011 and 2016