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Table 1 Baseline characteristics of study population (N = 92,211)

From: Effects of changes in residential fast-food outlet exposure on Body Mass Index change: longitudinal evidence from 92,211 Lifelines participants

Variable

 

Age, mean (SD)

46.2 (12.3)

Sex

 

Female, N (%)

52,941 (57.4)

Weekly working hours, median (IQR)

24 (0–36)

Years of education received, median (IQR)

12 [10,11,12,13,14,15]

Household situation

 

Living alone, N (%)

9,660 (10.5)

Living together with one household member, N (%)

32,281 (35.1)

Living together with two household members, N (%)

14,081 (15.3)

Living together with three household members, N (%)

24,964 (27.1)

Living together with four household members, N (%)

8,924 (9.7)

Living together with five or more household members, N (%)

2,161 (2.3)

Income, mean (SD)

1,558 (573)

Number of days of at least 30 min of physical activity per week, median (IQR)

5 [3,4,5,6]

Pregnancy between baseline and a year before the follow-up assessment, N (%)

4,355 (4.7)

Body Mass Index, mean (SD)

26.0 (4.2)

Change in Body Mass Index, mean (SD)

0.06 (1.73)

Waist-to-height ratio, mean (SD)

0.52 (0.07)

Number of fast-food outlets within 1 km, median (IQR)

3 [1,2,3,4,5,6,7]

Change in fast-food outlets within 1 km, median (IQR)

0 (0–1)

Number of physical activity facilities within 1 km, median (IQR)

1 (0–3)

Number of healthy food outlets within 1 km, median (IQR)

2 [1,2,3,4]

Neighbourhood address density, in number of addresses per km2, median (IQR)

594 (198–1,103)

Neighbourhood socio-economic status, standardised score, mean (SD)

0.03 (0.99)

  1. Note: Characteristics are based on non-imputed data. Percentage represent valid percentages. Note: SD = standard deviation; IQR = interquartile range