Table 2.
Range | N | Mean | SD | Response rates | Floor effects | Ceiling effects | |
---|---|---|---|---|---|---|---|
EQ-5D-3 L (Utility) | −0.594 to 1 | 234 | 0.60 | 0.36 | 95.29 % | 0.00 % | 19.73 % |
SF-6D (Utility) | 0.345 to 1 | 218 | 0.66 | 0.16 | 93.16 % | 0.92 % | 0.92 % |
SF-12 PCS | 0 to 100 | 209 | 36.88 | 12.32 | 89.32 % | 0.00 % | 0.00 % |
SF-12 MCS | 0 to 100 | 209 | 43.43 | 13.30 | 89.32 % | 0.00 % | 0.00 % |
SGRQ Symptoms Score | 0 to 100 | 221 | 33.71 | 27.89 | 94.44 % | 1.36 % | 1.36 % |
SGRQ Activity Score | 0 to 100 | 193 | 46.04 | 31.80 | 82.47 % | 7.77 % | 7.77 % |
SGRQ Impact Score | 0 to 100 | 194 | 22.13 | 22.42 | 82.90 % | 0.00 % | 0.00 % |
SGRQ Total Score | 0 to 100 | 175 | 32.08 | 24.18 | 74.79 % | 0.00 % | 0.00 % |
Scores or Utility Values of participants which could not be calculated due to missing items were not included within the analysis
N stands for the sample size. SD denotes the standard deviation. CI is abbreviated for confidence intervals
Floor effects is the proportion of patients in the lowest health state possible and ceiling effects is the proportion of patients in the highest health state poss
EQ-5D-3 L is anchored at -0.594 for worst possible health and 1 for best possible health
SF-6D is anchored at 0.345 for worst possible health and 1 for best possible health
SF-12 PCS & MCS scores are anchored at 0 for worst possible health and 1 for best possible health
SGRQ scores are anchored at 100 for worst possible health and 0 for best possible health
The EQ-5D-3 L and SF-12 was assessed in terms of complete responses for all questions
The SF-6D was regarded complete if there was sufficient items to calculate a score
The SGRQ was assessed by calculating if more than 24 % of the items were missing or not answered, then a total score could not be calculated