Table 1 Dysphagia items with abbreviated stems and item statistics^a

Frequency of difficulty swallowing

0 (never) to 4 (daily)

0, 0, 4; 1 (1.39)

Frequency of difficulty swallowing on one day

0 (never) to 2 (each swallow)

0, 0, 1; 0.45 (0.50)

Problems swallowing liquids

0 (no) and 1 (yes)

0, 0, 1; 0.13 (0.34)

Problems swallowing solid foods

0 (no) and 1 (yes)

0, 0, 2; 0.39 (0.52)

Severity of your trouble swallowing

0 (no trouble swallowing) to 4 (very severe)

0, 0, 4; 1.04 (1.31)

Severity of your trouble swallowing

0 (not at all severe) to 10 (very severe)

0, 0, 8; 1.43 (2.31)

Pills got stuck in esophagus/swallowing tube

0 (no) and 1 (yes)

0, 0, 1; 0.17 (0.38)

Solid food (not medications) got stuck in esophagus/swallowing tube

0 (no) and 1 (yes)

0, 0, 1; 0.28 (0.45)

Duration of time solid food was stuck

0 (not stuck) to 2 (≥5 min)

0, 0, 2; 0.35 (0.60)

Problems swallowing liquids after the solid food was stuck

0 (no) and 1 (yes)

0, 0, 1; 0.12 (0.33)

Solid food that got stuck made you vomit

0 (no) and 1 (yes)

0, 0, 1; 0.08 (0.27)

Pain or discomfort when swallowing

0 (does not hurt at all) to

0, 0, 2; 0.31 (0.52)

2 (hurts all the way down most of the time when I swallow)

Minutes taken to eat an average meal

0 (15 min) to 4 (> 60 min)

0, 1, 4; 0.95 (0.79)

Swallowing in general

0 (able to eat anything) to 4 (unable to swallow anything)

0, 1, 3; 1 (0.77)