| Sumario: | The purpose of the study was to assess the test--retest reliability of the Swedish versions of Dizziness Handicap Inventory short form (DHIsf) and Dizziness Handicap Inventory Screening version (DHI-S), and to assess correlations with the original Dizziness Handicap Inventory (DHI). Thirty-nine subjects with dizziness and/or disequilibrium were recruited from two Ear, Nose and Throat departments, and completed the three DHI versions during their visit to the clinic. Thirty-one subjects also completed the questionnaires at home the next day. For relative reliability, intraclass correlation values between 0.89 and 0.91 were found. For absolute reliability, the method errors were 6 points for DHI, 1 point for DHIsf and 3 points for DHI-S. The correlation between DHIsf and DHI was r == −−0.91 and between DHI-S and DHI r == 0.94. Answers were missing to 0.4% of the questions in DHI, 1.7% in DHIsf and 0.8% in DHI-S. It was concluded that DHIsf and DHI-S showed good test--retest reliability in line with that of DHI, and both short versions were highly correlated with the original version. The DHI-S showed better relative reliability, correlated stronger with DHI and had fewer missing answers compared with the DHIsf. DHI-S is therefore recommended when a short version of the DHI is needed.
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