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Table 1 Participant characteristics

From: Development of a patient-reported outcome measure (PROM) and change measure for use in early recovery following hip or knee replacement

Stages Stage One: Item generation and initial questionnaire development Stage Two: Item reduction and scale generation. Testing reliability and validity
Parameter/Study phase Phase One Phase Two Phase Three Phase Four
Age (years) 71.0 (10.3) 45–92 67 (11.3) 50–81 66.1 (9.9) 38–87 68 (10.9) 20–87
Sex Male/Female (% male) 14/16 (46.7) 16/18 (47) 71/97 (42) 65/90 (42)
Ethnicity WB 28 (93.3) WB 32 (94.1) WB 157 (93.5) WB 151 (97.4)
OW 2 (6.7) OW 2 (5.9) OW 7 (4.2) OW 1 (0.6)
WI 2 (1.2) I 1 (0.6)
Af 1 (0.6) Ar 1 (0.6)
OA 1 (0.6) C 1 (0.6)
Duration of disease (years) 4.6 (4.1) 0.67–20 4.4 (4.2) 0.5–30 6.2 (6.8) 0.5–43 6.2 (9.3) 0.5–74
Length of stay (days) 28.5 (24.0) 0–63 3.15 (2.83) 0–8 2.3 (2.5) 0–15 2.6 (2.7) 0–21
Type of surgery THA 16 (53.3) THA 9 (26) THA 70 (41.7) THA 58 (37.4)
TKA 11 (36.7) TKA 9 (26) TKA 26 (15.5) TKA 33 (21.3)
UKA 2 (6.7) UKA 12 (35) UKA 54 (32.1) UKA 55 (35.5)
Rev. THA 1 (3.3) Rev. THA 1 (3) PFJ 2 (1.2) Rev. THA 6 (3.9)
Rev. TKA 3 (9) Rev. THA 7 (4.2) Rev. TKA 3 (1.9)
Rev. UKA/TKA 9 (5.4)
Employment Employed 7 (23.3) Employed 16 (47) Employed 67 (39.9) Employed 38 (24.5)
Retired 21 (70) Retired 18 (53) Retired 91 (54.2) Retired 110 (71)
Disabled 2 (6.7) Disabled 10 (5.9) Disabled 7 (4.5)
Living situation Alone 6 (20) Alone 8 (24) Alone 41 (24.4) Alone 27 (17.4)
Family 24 (80) Family 26 (76) Family 127 (75.6) Family 128 (82.6)
Home situation One level 4 (13.3) One level 6 (18) One level 37 (22) One level 20 (12.9)
Up and down stairs 26 (86.7) Up and down stairs 28 (82) Up and down stairs 131 (78) Up and down stairs 135 (87.1)
  1. Data are n (%) or mean (SD) range. Ethnicity: WB White British, OW Other White, WI White Irish, Af African, OA Other Asian, I Indian, Ar Arabic, C Caribbean. Ethnicity categories from Office for National Statistics (ONS), Census 2011. Type of surgery: THA Total Hip Arthroplasty, TKA Total Knee Arthroplasty, UKA Unicompartmental Knee Arthroplasty, PFJ Patellofemoral Joint Replacement, Rev. THA Revision Total Hip Arthroplasty, Rev. UKA/ TKA Revision Unicompartmental Knee Arthroplasty/Total Knee Arthroplasty, Rev. TKA Revision Total Knee Arthroplasty