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Table 4 Internal consistency of the 63-item EIQ and its dimensions

From: The Endometriosis Impact Questionnaire (EIQ): a tool to measure the long-term impact of endometriosis on different aspects of women’s lives

  Numbera last 12 months 1 to 5 years ago more than 5 years ago" Total three recall periods
EIQ total 423 .97 (63 items) .97 .97 .98(189 items)
Physical-psychosocial 423 .97 (33 items) .96 .95 .98 (99 items)
Physical 423 .92 (13 items) .90 .90 .94 (39 items)
psychological 423 .95 (16 items) .93 .92 .96 (48 items)
Social 423 .91 (4 items) .90 .88 .93 (12 items)
Sexual 397 .84 (7 items) .85 .86 .93 (21 items)
Fertility 415 .73 (3 items) .73 .66 .85 (9 items)
Employment 397 .94 (11 items) .94 .94 .97 (33 items)
Educational 271 .93 (6 items) .92 .91 .93 (18 items)
Lifestyle 415 .53 (3 items) .57 .62 .84 (9items)
  1. Cronbach’s alpha was evaluated
  2. aOnly responders who skipped all items of the dimension (all three recall periods) were omitted