Development and validation of quality of life scale of nasopharyngeal carcinoma patients: the QOL-NPC (version 2)

Table 6 Change in scores and effect size from baseline to the end of radiotherapy (n = 60)

	Baseline score	Change scores^a	95 % CI of change scores	Effect size^b
PH	65.9 ± 15.5	−4.9 ± 6.4	(3.2, 6.5)	−0.31
PS	54.5 ± 15.8	−3.8 ± 5.3	(2.4, 5.2)	−0.24
SO	60.8 ± 17.6	−3.9 ± 6.0	(2.4, 5.5)	−0.22
SE	71.6 ± 17.0	−5.9 ± 5.4	(4.5, 7.3)	−0.82

Change scores^a, the score at the end of radiotherapy minus the baseline, −100 (maximum worsening) to +100 (maximum improvement)
Effect size^b, calculated as the change in scores divided by the SD of the baseline score

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