Observational Study
Copyright ©The Author(s) 2019.
World J Crit Care Med. Nov 19, 2019; 8(7): 127-134
Published online Nov 19, 2019. doi: 10.5492/wjccm.v8.i7.127
Table 1 Quadriceps thickness measured by 5 operators in a critical care setting
Operator
Thickness measured on three different attempts, mean (± SD) mm
IDLevel1st2nd3rd
1Consultant17.14 (± 6.64)17.49 (± 6.83)17.44 (± 6.82)
2Fellow17.23 (± 6.81)17.28 (± 6.92)17.17 (± 6.81)
3Fellow17.82 (± 6.73)17.87 (± 6.81)17.80 (± 6.77)
4Nurse17.11 (± 6.54)17.28 (± 6.49)17.35 (± 6.57)
5Nurse17.52 (± 6.64)17.42 (± 6.67)17.52 (± 6.71)
Table 2 Intraclass correlation coefficient for intraoperator variation among five operators
Operator
MeasurementsICC (95%CI); P valueCronbach’s alpha
IDLevel
1Consultant1stvs 2nd0.997 (0.992-0.999); < 0.00010.998
1stvs 3rd0.997 (0.993-0.998); < 0.00010.997
2ndvs 3rd0.998 (0.996-0.999); < 0.00010.998
Overall0.998 (0.997-0.999); < 0.00010.997
2Fellow1stvs 2nd0.997 (0.995-0.998); < 0.00010.997
1stvs 3rd0.997 (0.995-0.997); < 0.00010.997
2ndvs 3rd0.997 (0.995-0.998); < 0.00010.997
Overall0.998 (0.997-0.999); < 0.00010.998
3Fellow1stvs 2nd0.997 (0.995-0.999); < 0.00010.997
1stvs 3rd0.997 (0.995-0.999); < 0.00010.997
2ndvs 3rd0.998 (0.996-0.998); < 0.00010.998
Overall0.997 (0.995-0.999); < 0.00010.998
4Nurse1stvs 2nd0.998 (0.996-0.999); < 0.00010.998
1stvs 3rd0.997 (0.995-0.999); < 0.00010.998
2ndvs 3rd0.999 (0.998-0.999); < 0.00010.999
Overall0.999 (0.998-0.999); < 0.00010.999
5Nurse1stvs 2nd0.998 (0.996-0.999); < 0.00010.998
1stvs 3rd0.997 (0.995-0.998); < 0.00010.997
2ndvs 3rd0.998 (0.996-0.999); < 0.00010.998
Overall0.998 (0.997-0.999); < 0.00010.998
Table 3 Intraclass correlation coefficients for intraoperator variation among five operators for interoperator variation among 5 operators
Operator1comparisonICC (95%CI); P value
1st measurement2nd measurement3rd measurement
1 vs 20.979 (0.961, 0.988); < 0.0010.976 (0.956, 0.987); < 0.0010.977 (0.958, 0.987); < 0.001
1 vs 30.978 (0.960, 0.988); < 0.0010.978 (0.960, 0.988); < 0.0010.977 (0.959, 0.987); < 0.001
1 vs 40.965 (0.938, 0.981); < 0.0010.955 (0.920, 0.975); < 0.0010.962 (0.932, 0.979); < 0.001
1 vs 50.979 (0.963, 0.989); < 0.0010.967 (0.942, 0.982); < 0.0010.971 (0.948, 0.984); < 0.001
2 vs 30.988 (0.979, 0.994); < 0.0010.984 (0.971, 0.991); < 0.0010.982 (0.967, 0.990); < 0.001
2 vs 40.966(0.938, 0.981); < 0.0010.963 (0.933, 0.979); < 0.0010.966 (0.939, 0.981); < 0.001
2 vs 50.980(0.964, 0.989); < 0.0010.975 (0.956, 0.986); < 0.0010.978 (0.960, 0.988); < 0.001
3 vs 40.966 (0.939, 0.981); < 0.0010.969 (0.945, 0.983); < 0.0010.968 (0.942, 0.982); < 0.001
3 vs 50.983 (0.969, 0.991); < 0.0010.979 (0.962, 0.988); < 0.0010.980 (0.964, 0.989); < 0.001
4 vs 50.988 (0.978, 0.993); < 0.0010.989 (0.980, 0.994); < 0.0010.985 (0.973, 0.992); < 0.001
Overall0.977 (0.965, 0.986); < 0.0010.974 (0.960, 0.984); < 0.0010.975 (0.961, 0.985); < 0.001