Fig. 1.

Summary of response types and options.

Notes: ^*14 out of 34 questionnaires include multiple response types. ^**Includes: <10 each of “very poor” to “very well”; “major problems” to “no problems”; “no” to “most of the time”; “no” to “definitely”; “no” to “yes, a lot worse”; “no problems” to “always”; and “more often” to “about the same”. Includes one each of “no” to “yes, that worries me seriously”; “less than 6 months ago” to “more than two years ago”; “very gradually” to “suddenly”; “steadily worsened” to “got worse and then leveled off”; “not at all” to “highly”; “excellent” to “poor”; “no” to “very much”; agree/disagree; good/poor; same/worse; and suddenly/gradually”. ^***Includes: “always” to “never”; “frequently” to “never”; “always or almost always” to “never or almost never”; “very often” to “never”, and “often” to “never”. ^†Includes: “better than ever before” to “worse than ever before”; “much better” to “much worse”; “very strong improvement” to “very sharp decline”; “ much improved” to “much worse”; “much better now” to “much poorer now”; and “better than when I was younger” to “definitely worse than when I was younger”.