Validity and Reliability of the Turkish Version of National Comprehensive Cancer Network/Functional Assessment of Cancer Therapy Ovarian Symptom Index-18 (NFOSI-18) and Neurotoxicity-4 (NTX-4) for Patients with Advanced Ovarian Cancer
Table 2
Internal consistency and item reliability of NFOSI-18 and NTX-4.
Corrected item-total correlation
Cronbach’s alpha if item deleted
Item reliability
NFOSI-18
Item 1
0.616
0.914
0.614
Item 2
0.642
0.913
0.613
Item 3
0.748
0.910
0.612
Item 4
0.535
0.916
0.799
Item 5
0.773
0.909
0.677
Item 6
0.481
0.918
0.681
Item 7
0.474
0.918
0.660
Item 8
0.689
0.912
0.657
Item 9
0.576
0.915
0.640
Item 10
0.602
0.915
0.642
Item 11
0.609
0.914
0.850
Item 12
0.326
0.921
0.839
Item 13
0.717
0.911
0.687
Item 14
0.563
0.916
0.648
Item 15
0.558
0.916
0.646
Item 16
0.592
0.915
0.865
Item 17
0.630
0.914
0.694
Item 18
0.686
0.913
0.791
NFOSI-18 total Cronbach’s alpha
0.919
NTX-4
Item 1
0.749
0.912
0.805
Item 2
0.867
0.871
0.805
Item 3
0.822
0.890
0.848
Item 4
0.828
0.893
0.827
NTX-4 total Cronbach’s alpha
0.917
NFOSI-18: the National Comprehensive Cancer Network/Functional Assessment of Cancer Therapy Ovarian Cancer Symptom Index-18 Item Version; NTX-4: Functional Assessment of Cancer Therapy/Gynecologic Oncology Group Neurotoxicity 4-item. Weighted kappa coefficient.
