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Table 2 Data quality – missing data

From: Using mixed methods to select optimal mode of administration for a patient-reported outcome instrument for people with pressure ulcers

  Self-completed (n = 49) Administered (n = 21) Total* (n = 70)
PU-QOLs with missing data 19 (38.8%) 3 (14.3%) 22 (31.4%)
Total number of PU-QOL items missed (range 1-87 items per PU-QOL) 619 (14.5%) 29 (1.6%) 648 (10.6%
Age    
  Number under 70 years (n = 12/25)+ (n = 2/14)+ (n = 14/39)+
  Number items missed 336 (15.5%) 3 (0.3%) 345 (10.2%)
  Number 70 years or older (n = 7/24)+ (n = 1/7)+ (n = 8/31)+
  Number items missed 283 (13.6%) 26 (4.3%) 309 (11.5%)
Type of healthcare setting    
  Number acute (n = 16/26)+ (n = 2/12)+ (n = 18/38)+
  Number items missed 604 (26.7%) 28 (2.7%) 632 (19.1%)
  Number community (n = 3/23)+ (n = 1/9)+ (n = 4/32)+
  Number items missed 15 (0.8%) 1 (0.1%) 16 (0.6%)
  1. +Refers to the number of patients with missing data versus the total number of patients in the respective subgroup.
  2. *A total of 70 PU-QOLs were returned and analysed (5 completed PU-QOLs were lost in the post).
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