Development of the opioid self-management scale for advanced Cancer patients with pain and examination of its validity and reliability

Table 4 Distinctive validity and convergent validity of the OSSA^a)

Subscale	No. of items	Discriminant validity (range of correlation coefficients)^b)	Convergent validity (range of correlation coefficients)^c)	Scaling success (%)^d)
Managing opioids and coping with pain	9	0.16–0.56	0.65–0.78	126/126(100%)
Talking to healthcare provider	7	0.01–0.64	0.73–0.93	84/84(100%)
Talking to friends and family	5	−0.02 – 0.50	0.62–0.96	50/50(100%)
Recording pain and opioid use	5	0.00–0.34	0.54–0.89	50/50(100%)
Living with the disease	4	0.06–0.52	0.73–0.94	36/36(100%)
Understanding the characteristics of pain	3	0.09–0.35	0.56–0.90	24/24(100%)

^a) Opioid Self-management Scale for Advanced cancer patients with Pain
^b)Pearson’s correlation coefficient between the score for each item and the score for each domain excluding that item
^c)Pearson’s correlation coefficient between the score for each item and the scores for the domains to which that item does not belong
^d) Number of correlation coefficients for which convergent correlation is higher than distinctive correlation/total number of correlation coefficients

ISSN: 1472-684X