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Table 1 Descriptive statistics for distance between home and food purchase locations by individual, neighbourhood, and trip characteristics

From: Where do people purchase food? A novel approach to investigating food purchasing locations

  All food purchases Food purchases when origin of trip was home Food purchases within supermarkets
n. Median (IQR) n. Median (IQR) n. Median (IQR)
Distance from home (km) (if ≤ 35 km) 893 3.64 (1.82, 7.19) 484 3.40 (1.60, 6.37) 317 2.79 (1.61, 5.59)
Within-person median distance from home (range) 56 min: 0.35
max: 16.81
55 min: 0.33
max: 22.96
56 min: 0.29
max: 15.33
  n. % of purchases n. % of purchases n. % of purchases
Distance from home categories (km)
≤1  93 10.1 60 12.3 54 16.5
>1–2  160 17.5 97 19.9 57 17.4
>2–3  93 10.1 54 11.1 49 15.0
>3–5  196 21.4 100 20.5 67 20.5
>5–10  184 20.1 113 23.2 77 23.5
>10–20  151 16.5 51 10.5 13 4.0
>20–35  16 1.8 9 1.9 0 0
>35 (excluded from analysis) 23 2.5 3 0.6 10 3.1
  n. Median distance from home (IQR) n. Median distance from home (IQR) n. Median distance from home (IQR)
Age a
18–34 years 173 4.35 (1.61, 14.35) 85 3.71 (1.48, 7.82) 44 2.16 (0.33, 4.03)
35–54 years 373 3.54 (1.70, 5.98) 164 2.67 (1.61, 5.67) 118 2.62 (1.70, 5.27)
≥55 years 318 3.49 (1.93, 6.74) 219 3.53 (1.96, 6.74) 146 3.38 (1.85, 5.59)
Missing 29 6.61 (1.32, 9.60) 16 6.58 (1.30, 12.57) 9 6.61 (1.27, 9.09)
Sex b
Female 743 3.54 (1.87, 6.56) 401 3.44 (1.70, 5.98) 261 3.29 (1.82, 5.60)
Male 121 5.09 (1.70, 12.43) 67 2.28 (0.63, 8.66) 47 1.70 (0.63, 2.18)
Missing 29 6.61 (1.32, 9.60) 16 6.58 (1.30, 12.57) 9 6.61 (1.27, 9.09)
Neighbourhood characteristics
Low SES-Low access 200 2.78 (1.31, 4.71) 82 2.09 (1.29, 3.74) 50 2.08 (1.22, 2.85)
Low SES-High access 181 4.03 (0.87, 12.43) 92 2.63 (0.71, 4.35) 58 0.71 (0.63, 2.79)
High SES-Low access 309 5.60 (3.40, 8.43) 192 5.59 (3.38, 7.19) 122 5.59 (3.47, 6.56)
High SES-High access 203 3.17 (1.82, 5.22) 118 2.45 (1.65, 5.03) 87 2.23 (1.56, 3.29)
Origin prior to making purchase
Home 484 3.40 (1.60, 6.37) 202 2.62 (1.56, 5.59)
Work 164 5.13 (3.13, 14.83) 33 2.85 (1.52, 5.13)
Other 226 3.62 (1.96, 7.38) 74 3.38 (1.90, 4.55)
Missing 19 2.64 (0.85, 6.56)   8 2.36 (0.67, 6.12)
Travel mode when origin was home c
Car 386 3.74 (2.08, 6.65)
Public transport 16 4.35 (4.35, 4.62)
Walk/cycle 73 0.74 (0.63, 1.58)
Missing    7 2.09 (1.82, 11.41)   
Day of week
Weekday 629 3.54 (1.82, 6.74) 307 3.37 (1.58, 5.88) 223 2.62 (1.47, 5.13)
Weekend 264 4.33 (1.82, 8.59) 177 3.74 (1.65, 8.66) 94 3.46 (1.82, 5.75)
  1. aNumber of participants by age group: 18–34 years n = 11 (19.6%); 35–54 years n = 20 (35.7%); ≥ 55 years n = 23 (41.1%); missing n = 2 (3.6%)
  2. bNumber of participants by sex: female n = 45 (80.3%); male n = 9 (16.1%); missing n = 2 (3.6%)
  3. cResults not shown for response categories where fewer than 10 purchases by travel mode (other n = 0; home delivery n = 2 [4.56 (IQR 3.61, 5.51)]