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Table 1 Demographic and clinical characteristics of participants with psoriatic arthritis

From: Development of a national survey on foot involvement among people with psoriatic arthritis in Australia using a best practice approach: a survey development protocol

Variables Round 1 Round 2 Round 3
Cognitive interviews (n = 6)
Paper-based
Cognitive interviews (n = 6)
Paper-based
Cognitive interviews (n = 6)
Web-based
Pilot testing (n = 3)
Paper-based
Pilot testing (n = 3)
Web-based
Ages, years 45 (15) 48 (12) 56 (14) 48 (9) 58 (12)
Women, n (%) 5 (83) 2 (33) 2 (33) 2 (67) 2 (67)
Ethnicity, n (%)
 Australian European 6 (100) 5 (83) 3 (5) 1 (34) 1 (34)
 New Zealand European    1 (17)   
 Indian   1 (17) 1 (17)   
 South American    1 (16) 1 (33)  
 British     1 (33) 1 (33)
 Bosnian      1 (33)
Body Mass Index, Kg/m2 34 (12) 29 (6) 30 (8) 35 (11) 26 (2)
 Employment status, n (%)
 Employed full-time 3 (50) 3 (50) 3 (50) 1 (34) 1 (34)
 Employed part-time 1 (17)     1 (33)
 Self-employed 1 (17)   1 (17)   
 Unemployed (health reason)   1 (17) 1 (17) 1 (33)  
 Unemployed (home-maker)   1 (17)    
 Retired 1 (16) 1 (16) 1 (16) 1 (33) 1 (33)
Education level, n (%)
 No school certificate 1 (17) 1 (17)   1 (34) 1 (33)
 School certificate 1 (17)    1 (33)  
 Higher school certificate   2 (33) 1 (17)   
 Trade/apprenticeship   1 (17) 3 (50)   
 Diploma 2 (33)     
 University degree or higher 2 (33) 2 (33) 2 (33) 1 (33) 2 (67)
Disease duration, years 15 (12) 15 (9) 5 (4) 14 (10) 3 (2)
Patient global assessment Joint & skin (VAS 0–100), mm 74 (15) 37 (37) 40 (24) 40 (38) 50 (26)
Skin (VAS 0–100), mm 36 (37) 28 (29) 25 (19) 7 (6) 37 (40)
Joint (VAS 0–100), mm 66 (25) 37 (35) 47 (16) 40 (36) 50 (26)
Global pain (VAS 0–100), mm 69 (21) 37 (36) 53 (21) 40 (26) 47 (38)
Foot pain (VAS 0–100), mm 73 (22) 37 (37) 38 (43) 33 (6) 60 (26)
Length of interview, minutes 63 (21) 60 (23) 6 (3) *2 *2
Time to complete survey *1 *1 29 (6) 26 (6) 22 (4)
  1. Data presented as mean (SD) unless specified. VAS Visual analogue scale
  2. *1 Participants were interviewed about the survey to obtain their views but did not complete it
  3. *2 Following survey completion, participants were asked if they had experienced any difficulties. There was no audio-recorded interview