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Table 1 Demographic characteristics

From: Impact of increasing the availability of healthier vs. less-healthy food on food selection: a randomised laboratory experiment

 

Availability Condition

Total

(N = 417)

Increased Healthier

(n = 143)

Increased Less-Healthy

(n = 138)

Equal Healthier and Less-Healthy

(n = 136)

Age (M (SD))

40.45 (13.43)

41.07 (14.21)

38.49 (13.83)

40.02 (13.83)

Gender (% (n))a

 Male

42.7% (61)

42.0% (58)

48.5% (66)

44.4% (185)

 Female

57.3% (82)

58.0% (80)

51.5% (70)

55.6% (232)

Education (% (n))

 Lower

(up to GCSEs)

49.0% (70)

51.4% (71)

50.7% (69)

50.4% (210)

 Higher

(degree or above)

51.0% (73)

48.6% (67)

49.3% (67)

49.6% (207)

Annual household income (% (n))

 Up to £17,499

18.9% (27)

18.8% (26)

16.2% (22)

18.0% (75)

 £17,500–£29,999

22.4% (32)

18.8% (26)

23.5% (32)

21.6% (90)

 £30,000–£49,999

24.5% (35)

27.5% (38)

29.4% (40)

27.1% (113)

 £50,000 or higher

26.6% (38)

26.1% (36)

20.6% (28)

24.5% (102)

 Don’t know/

Prefer not to say

7.7% (11)

8.7% (12)

10.3% (14)

8.9% (37)

Ethnicity (% (n))

 White

84.6% (121)

84.8% (117)

88.2% (120)

85.9% (358)

 Mixed Ethnicity

2.8% (4)

2.9% (4)

1.5% (2)

2.4% (10)

 Asian

8.4% (12)

8.7% (12)

5.1% (7)

7.4% (31)

 Black

2.1% (3)

1.4% (2)

2.2% (3)

1.9% (8)

 Other

2.1% (3)

2.2% (3)

2.9% (4)

2.4% (10)

Hunger (M (SD))b

0.80 (1.06)

0.95 (0.95)

0.72 (1.16)

0.82 (1.06)

Response inhibition (M (SD))

 Stroop scorec

− 277.5

(197.7)

− 295.6

(250.6)

− 287.5

(275.1)

− 286.8

(242.1)

 Stop-signal reaction timed

257.7

(202.7)

247.7

(157.1)

227.1

(141.5)

244.5

(170.6)

Explicit food appeal: Enjoyment ratingse (M (SD))

 Healthier food options

0.71

(0.95)

0.54

(0.82)

0.66

(0.92)

0.64

(0.90)

 Less-healthy food options

0.99

(0.99)

1.02

(1.04)

1.12

(0.90)

1.04

(0.98)

Implicit food appeal: IAT scoresf (M (SD))

 Healthier food

0.21

(0.48)

0.28

(0.48)

0.23

(0.58)

0.24

(0.51)

 Less-healthy food

0.18

(0.51)

0.17

(0.55)

0.23

(0.50)

0.19

(0.52)

  1. a No participants selected ‘Other’ as their gender
  2. b 7-point rating scale: 0 was labelled “Neither hungry nor full”; 1 was labelled “A little hungry”
  3. c Mean response time in milliseconds for correct control trials minus mean response time in milliseconds for correct incongruent trials
  4. d Estimated using the quantile method, in which all reaction times on correct ‘go’ trials are arranged in ascending order, and the reaction time corresponding to the proportion of failed inhibition is selected. The stop-signal reaction time is this quantile reaction time minus the mean stop-signal delay
  5. e Mean rating across all six healthier (less-healthy) items (ratings from −3 “Very unenjoyable” to 3 “Very enjoyable”)
  6. f Implicit Association Task scores ((Mean reaction time for the negative pairings minus Mean reaction time for the positive pairings)/Pooled S.D.); positive scores represent positive implicit attitudes towards the food items
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BMC Public Health

ISSN: 1471-2458

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