Skip to main content

Table 4 Internal consistency reliability of the HIV Disability Questionnaire (HDQ)

From: Reliability and validity of a new HIV-specific questionnaire with adults living with HIV in Canada and Ireland: the HIV Disability Questionnaire (HDQ)

HDQ score

HDQ severity score

HDQ episodic score

Cronbach’s alpha (95 % CI)

Cronbach’ alpha (95 % CI)

Canada

Ireland

Canada

Ireland

Physical

0.92 (0.90, 0.94)

0.89 (0.86,0.92)

0.92 (0.91 , 0.94)

0.88 (0.84,0.92)

Cognitive

0.87 (0.82, 0.91)

0.84 (0.77,0.90)

0.81 (0.74, 0.88)

0.84 (0.76,0.92)

Mental-emotional

0.93 (0.91, 0.95)

0.91 (0.88,0.94)

0.91 (0.89, 0.94)

0.90 (0.87,0.94)

Uncertainty

0.93 (0.91, 0.94)

0.92 (0.90,0.94)

0.95 (0.94, 0.97)

0.94 (0.92,0.97)

Difficulty with day-to-day activities

0.91 (0.83, 0.93)

0.88 (0.83,0.94)

0.92 (0.89, 0.95)

0.85 (0.77,0.93)

Challenges to social inclusion

0.90 (0.88, 0.93)

0.90 (0.85,0.94)

0.94 (0.92, 0.97

0.90 (0.85,0.94)

HDQ total

(all items)

0.97 (0.97, 0.98)

0.96 (0.95,0.98)

0.98 (0.97, 0.98)

0.96 (0.95,0.98)

  1. Interpretation: Cronbach alpha > 0.80 defined as acceptable
  2. CI Confidence Interval