Figure 2From: Reliability of 95% confidence interval revealed by expected quality-of-life scores: an example of nasopharyngeal carcinoma patients after radiotherapy using EORTC QLQ-C 30 Skewness analyses for EORTC QLQ-C30 by an item-by-item approach of cancer stages. *, statistically significant difference in the cancer stage groups by the band of 95% CI not overlaied (the dot denotes point estimation of skewness coefficient; the border line in red represents the value of skewness coefficient equal to zero).Back to article page