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Table 2 FSZ items that loaded onto 5 factors, factor loadings, communalities, item means and relative frequencies from the large-scale-study

From: Validation of the Food Safe Zone questionnaire for families of individuals with Prader-Willi syndrome

FSZ Factor Labels and Items

Factor Loading

Communalities

Item Means (SD)

All or Most of the Time

Some or None of the Time

1. Alert Others, Supervision in the Community

Make sure adults involved with my child are aware of his/her food issues.

.79

.66

3.68 (.74)

91.7%

8.3%

Alert others of child’s food issues (to ensure they do not give child access to food).

.78

.67

3.47 (.91)

85.0%

15.0%

Make sure they are supervised while away from home.

.76

.66

3.64 (.75)

89.7%

10.3%

Ensure child has no access to other people’s food at school, camp, or work.

.67

.53

3.06 (1.16)

72.1%

27.9%

Make a food plan for child prior to attending events, outings, restaurantsa

.62

.56

3.24 (.89)

79.7%

20.3%

2. Lock, Restrict Food Sources

Lock up pantry or cabinets where food is kept

.90

.87

2.64 (1.35)

55.3%

44.7%

Lock up refrigerator or freezer

.89

.80

2.46 (1.40)

49.9%

50.1%

Ensure there is no food left on counter tops, tables, or other areas of access

.65

.68

2.99 (1.35)

70.2%

29.8%

Lock up trash, compost, or recycling bins

.50

.51

1.62 (1.35)

20.5%

79.5%

Keep money or credit cards from child

.46

.50

2.32 (1.36)

46.0%

54.0%

Use security features (alarm, camera) in home to monitor food access

.40

.47

1.62 (1.23)

20.7%

79.3%

3. Check for Food

Check their person (pockets, pat down, shoes, etc.) for food, wrappers, or money

.87

.82

1.70 (.94)

18.6%

81.4%

Check their belongings or bedroom for food, wrappers, or money

.87

.83

1.98 (1.03)

28.0%

72.0%

Check on child in bathroom to be sure he or she is not eating food

.84

.75

1.69 (.99)

19.6%

80.4%

4. At Home Supervision, Meals

Make sure child is busy while at home

.72

.66

2.86 (.85)

67.6%

32.4%

Avoid eating in front of child unless they are also eatinga

.69

.55

2.86 (1.02)

67.0%

33.0%

Aware of where child is at home all the time (but may not be in sight of caregiver)

.63

.63

3.39 (.86)

85.6%

14.4%

Supervise - always have eyes on at home

.61

.62

3.02 (.93)

73.9%

26.1%

Make sure that meals are planned and on time

.50

.41

3.05 (.81)

79.4%

20.6%

5. Avoid Food Settings

Avoid taking child to the grocery store

.85

.79

2.08 (1.07)

34.3%

65.7%

Avoid taking child to restaurants

.84

.80

2.18 (1.02)

34.3%

60.2%

  1. aitems are from the follow-up study and included here for reader convenience. See Additional Table 1 Table for the complete PCA results from the follow-up study