Table 1.
The composition and α coefficient of the five dimensions of nutrition during pregnancy survey
| No | Dimension | Total no of itemsa | Type of question | Reference | No of newly added itemsb | No of modified itemsc | α coefficient |
|---|---|---|---|---|---|---|---|
| 1 | Women’s reported adherence to the five food groups and extras | 6 | Open-ended, six-question tool | Hoerr et al37 | 3 | – | –d |
| 2 | Women’s attitudes toward key nutrition topics | 17 | 5-point Likert scale | Worsley et al36 | 10 | 4 | 0.805e |
| 3 | Women’s level of motivation to maintain a healthy diet | 4 | Three questions: 10-point Likert scale One question: 5-point Likert scale |
Skouteris et al34 | – | 1 | 0.807e |
| 4 | Women’s knowledge of the AGHE during pregnancy and a range of diet-related matters | 70 | Multiple-choice questions | Hendrie et al35 Worsley et al36 Bondarianzadeh et al32 |
15 | 12 | 0.801f |
| 5 | Women’s knowledge of guidelines for weight gain and its management during pregnancy | 12 | Hendrie et al35 | 8 | 4 | –d |
Notes:
Total number of items, including items that have been taken from the validated surveys without any modification, modified items, and newly added items.
Number of new items that were devised for this survey.
Number of items that have been taken from the validated surveys and been modified to suit the study aim.
Reliability test was not calculated for the first and fifth dimensions because they contained multidimensional scale questions (eg, open-ended questions, multiple-choice questions).
Cronbach’s alpha was calculated to measure reliability of measurements with scale type of questions.
K–R 20 was calculated to measure reliability of measurements with dichotomous choices.
Abbreviations: AGHE, Australian Guide to Healthy Eating; K–R 20, Kuder and Richardson Formula 20.