Table 6 Test-retest properties of the BCI and FACT-Bl-Cys (T3 and T3 retest)
Domains | Valid population (n) | No. of items per domain | T3 Mean (SD) | T3 Median (min-max) | T3 retest Mean (SD) | T3 retest Median (min-max) | T3-T3 retest | T3 retest:a ICCagreement (95% CI) | Measurement error:b SEMagreement | Measurement error:c SDCindividual | Measurement error:d SDCgroup | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mean change (SD) | 95% CI | SE | |||||||||||
BCI | |||||||||||||
 Urinary domain | 53 | 12 | 84 (17) | 91 (32–100) | 86 (15) | 92 (31–100) | −2 (7) | −25; 15 | 0.9 | 0.90 (0.83; 0.91) | 4.98 | 13.82 | 1.90 |
  Function | 43 | 4 | 76 (33) | 100 (0–100) | 83 (28) | 100 (0–100) | −7 (16) | −57; 8 | 2.4 | 0.85 (0.71; 0.92) | 12.16 | 33.72 | 5.14 |
  Bother | 52 | 8 | 88 (12) | 91 (50–100) | 88 (14) | 92 (47–100) | 0 (9) | −17; 36 | 1.2 | 0.77 (0.63; 0.86) | 6.13 | 16.99 | 2.36 |
 Bowel domain | 61 | 10 | 84 (14) | 88 (37–100) | 86 (14) | 90 (47–100) | −2 (10) | −26; 26 | 1.3 | 0.76 (0.63; 0.85) | 7.05 | 19.54 | 2.50 |
  Function | 57 | 4 | 85 (17) | 92 (36–100) | 87 (14) | 92 (42–100) | −2 (11) | −33; 29 | 1.5 | 0.74 (0.60; 0.84) | 7.80 | 21.63 | 2.86 |
  Bother | 61 | 6 | 83 (16) | 88 (33–100) | 85 (16) | 92 (38–100) | −2 (11) | −29; 26 | 1.4 | 0.76 (0.63; 0.85) | 7.98 | 22.12 | 2.83 |
 Sexual domain | 19 | 12 | 40 (16) | 42 (3–65) | 38 (17) | 35 (8–69) | 2 (11) | −11; 26 | 2.5 | 0.78 (0.53; 0.91) | 7.55 | 20.92 | 4.80 |
  Function | 14 | 7 | 26 (16) | 29 (0–48) | 29 (16) | 29 (4–54) | −3 (5) | −14; 8 | 1.4 | 0.93 (0.79; 0.98) | 4.17 | 11.56 | 3.09 |
  Bother | 42 | 5 | 62 (28) | 60 (6–100) | 55 (26) | 50 (13–100) | 7 (28) | −59; 80 | 4.3 | 0.47 (0.20; 0.67) | 20.07 | 55.63 | 8.58 |
FACT-Bl-Cys | |||||||||||||
 FACT-PWB | 58 | 7 | 25 (4) | 26 (13–28) | 25 (3) | 26 (16–28) | 0 (2) | −7; 8 | 0.3 | 0.74 (0.59; 0.83) | 1.76 | 4.88 | 0.64 |
 FACT-SWB | 57 | 7 | 22 (4) | 22 (0–28) | 22 (3) | 23 (13–28) | −1 (4) | − 19; 5 | 0.6 | 0.43 (0.19; 0.62) | 3.01 | 8.34 | 1.10 |
 FACT-EWB | 54 | 6 | 21 (3) | 21 (11–24) | 21 (3) | 22 (12–24) | 0 (2) | −4; 7 | 0.3 | 0.72 (0.56; 0.83) | 1.57 | 4.36 | 0.59 |
 FACT-FWB | 54 | 7 | 20 (5) | 21 (6–28) | 20 (5) | 22 (9–28) | −1 (3) | −8; 8 | 0.5 | 0.78 (0.64; 0.86) | 2.35 | 6.52 | 0.89 |
 Bl-Cys domain | 54 | 15 | 45 (7) | 44 (24–57) | 46 (8) | 47 (20–59) | 0 (4) | −10; 13 | 0.6 | 0.82 (0.71; 0.89) | 3.14 | 8.69 | 1.18 |
EQ-5D-5 L | |||||||||||||
 5D-5 L | 55 | 5 | 0.87 (0.1) | 0.91 (0.49–0.95) | 0.85 (0.1) | 0.88 (0.54–0.95) | 0 (0.1) | −0.1;0.2 | 0.01 | 0.82 (0.71; 0.89) | 0.05 | 0.13 | 0.02 |
 EQ-VAS | 62 | 1 | 75 (22) | 81 (0–100) | 73 (26) | 81 (0–100) | 2 (30) | −85;87 | 4 | 0.23 (−0.26; 0.45) | 21.21 | 58.79 | 7.47 |