Table 3 The test–retest reliability of items in Parts 1 and 2
| Â | Question | Test | English version | Chinese version |
|---|---|---|---|---|
Part 1 | ||||
 Q8a | Meals consumed at home: Weekdays–meals/day | Pearson Correlation | r = 0.111; p = 0.552 | r = 0.367; p = 0.101 |
 Q8b | Meals consumed at home: Weekends–meals/day | Pearson Correlation | r = 0.352; p = 0.061 | r = 0.079; p = 0.740 |
 Q9 | Taking antihypertensive drugs | McNemar | 1.000 | 0.625 |
 Q10 | Using a measuring spoon at home | McNemar | 0.508 | 0.500 |
 Q11a | Additional food seasoning–pickles | McNemar | 0.035 | 0.008 |
 Q11b | Additional food seasoning–sauces | McNemar | 0.026 | 0.009 |
 Q11c | Additional food seasoning–MSG/chicken essence | McNemar | 0.000 | 0.001 |
 Q11d | Additional food seasoning–soy sauce | McNemar | 0.009 | 0.000 |
 Q11e | Additional food seasoning–Nil | McNemar | 0.002 | 0.000 |
 Q12 | Preference for a salty taste in food | Pearson Correlation | r = 0.275; p = 0.121 | r = –0.174; p = 0.450 |
 Q13 | Amount of food consumed at home (%) | Pearson Correlation | r = 0.330; p = 0.070 | r = 0.138; p = 0.550 |
 Q14 | How often uses a measuring spoon when cooking | Pearson Correlation | r = 0.004; p = 0.986 | r = –0.221; p = 0.349 |
 Q15 | Deliberately limiting salt being added to cooking (Chinese version only) | Pearson Correlation | Not performed | r = –0.080; p = 0.739 |
 Q16a | How do you add salt to cooking–use a spatula | McNemar | 0.143 | 1.000 |
 Q16b | How do you add salt to cooking–cooking pot | McNemar | 0.035 | 0.754 |
 Q16c | How do you add salt to cooking–tablespoon | McNemar | 0.007 | 0.508 |
 Q16d | How do you add salt to cooking–measuring spoon | McNemar | 0.687 | 1.000 |
 Q17a | Use of measuring spoon–work out the amount for each dish | McNemar | 0.625 | 1.000 |
 Q17b | Use of measuring spoon–follow the experience | McNemar | 0.410 | 0.180 |
 Q17c | Use of measuring spoon–follow the preferred taste | McNemar | 0.001 | 1.000 |
 Q17d | Use of measuring spoon–never use a spoon | McNemar | 0.064 | 0.180 |
 Q18 | Has relatives with hypertension | McNemar | 0.344 | 0.344 |
 Q19 | Advised by a doctor to reduce salt intake | McNemar | 1.000 | 0.625 |
 Q20 | Advised by family, friend and relatives to reduce salt intake | McNemar | 0.289 | 0.791 |
 Q21 | Advertising on TV, magazines and internet regarding salt reduction | McNemar | 0.581 | 0.754 |
Part 2 | ||||
 Q1 | The amount of salt intake recommended by the World Health Organization | McNemar | 0.267 | 0.500 |
 Q2 | The long–term impact of high salt intake on health | McNemar | 1.000 | 0.581 |
 Q3 | The diagnostic criteria for hypertension | McNemar | 1.000 | 0.388 |
 Q4 | The causes of hypertension | McNemar | 0.625 | 1.000 |
 Q5 | The prevention of hypertension | McNemar | 0.424 | 0.625 |
 Q6 | The complications of poor hypertension control | McNemar | 0.581 | 0.687 |