Table 2 Correlation between multi-item scales and its own scale corrected for overlap (figures are Pearson correlation coefficient obtained from pretreatment assessment)*

Dysphagia

Problems eating solid foods

0.82

0.52

0.40

0.22

0.21

Problems eating liquidized or soft food

0.87

0.34

0.29

0.01

0.08

Problems drinking liquids

0.78

0.17

0.23

0.04

0.03

Pain

Eating discomfort

0.61

0.76

0.55

0.32

0.33

Stomach pain

0.31

0.84

0.38

0.34

0.23

Stomach discomfort

0.27

0.89

0.46

0.42

0.31

Abdomen bolting

0.21

0.62

0.41

0.24

0.36

Reflux

Acid or bile problem

0.30

0.44

0.83

0.21

0.30

Acid indigestion or heartburn

0.24

0.52

0.73

0.21

0.18

Belching trouble

0.35

0.33

0.69

0.39

0.25

Eating restrictions

Full up too quickly

0.34

0.54

0.46

0.74

0.35

Trouble enjoying meals

0.38

0.34

0.20

0.72

0.08

Long time to complete meals

0.20

0.40

0.33

0.74

0.38

Eating trouble in front of other people

0.08

0.46

0.35

0.77

0.20

Anxiety

Thinking about illness

0.19

0.39

0.31

0.43

0.92

Worry about low weight

0.18

0.42

0.37

0.34

0.85

Health worry

0.04

0.28

0.01

0.07

0.46