Table 5.

Responsiveness testing (n = 19)

Variable	Mean baseline score – mean follow-up score	Paired differences mean (95% CI)	Ratio of subjects with increased score for ≥1 (%)	Summary score range at baseline	Standardised effect size*	Standardised response mean†	P‡	r§	P§
SASS	11.1–12.1	1.0 (0.2–1.8)	63.2	8–14	0.601	0.612	0.016	0.096	0.696
Colour satisfaction	1.9–2.7	0.8 (0.5–1.2)	73.6	1–3	1.485	1.101	<0.001	0.020	0.934

^*Glass’ Δ effect size: average difference between the two measurements divided by the standard deviation of the baseline score.

^†Standardised response mean: average difference between the two measurements divided by the standard deviation of the differences between the paired measurements.

^‡Paired samples t-test.

^§Pearson correlation coefficient with corresponding P-value for correlation between change in the Smile Aesthetics Satisfaction Scale (SASS) and colour satisfaction, and change in tooth colour (delta E) as a result of bleaching.