Development of a nutrition knowledge questionnaire for obese adults

Figures & data

Figure 1.  Summary of steps followed in the development of the nutrition knowledge questionnaire for obese adults (figure inspired by Whati et al. 22).

Table 1. Internal consistency in pilot study of obese adults (n=33)

	Internal consistency
Knowledge section (number of items)	(Cronbach's α)
1. Dietary recommendations 11	0.66
2. Sources of nutrients (55)	0.80
3. Healthy food choices 21	0.51
Total (section 1–3) (87)	0.84

Table 2. Differences in knowledge scores between public health nutrition students and construction students in test (n=34)

	Public health nutrition students (n=16)		Construction students (n=18)
Knowledge section (max score)	Mean	SD	Mean	SD
1. Dietary recommendations 11	10.1*	1.5	9.0	1.4
2. Sources of nutrients (52)	43.8***	4.0	34.3	5.1
3. Healthy food choices 19	16.1**	2.2	13.6	2.1
4. Obesity reduction factors 10	8.2***	1.1	6.9	1.1
Total (92)	78.2***	5.4	63.8	7.4

Independent samples t-test, two-sided. *p<0.05, **p<0.01, ***p<0.001.

Table 3. Test–retest reliability for public health nutrition students (n=13) and construction students (n=14)

	Test–retest reliability
Knowledge section (max score)	(Pearson's r)
1. Dietary recommendations 11	0.56**
2. Sources of nutrients (52)	0.85***
3. Healthy food choices 19	0.64***
4. Obesity reduction factors 10	0.53**
Total (92)	0.82***

**pB0.01, ***pB0.001

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