Table 3 Percentage delivery balloon underexpansion (DBU) depending on baseline RVD, p = 0.630.

RVD range (mm)	Number	Mean DBU (%)	SD	95% CI for mean
				Lower bound	Upper bound
<2.35	101	19.51	7.22	18.08	20.93
2.35–2.59	97	19.42	7.34	17.94	20.90
2.60–2.81	95	18.33	7.17	16.87	19.79
2.82–3.18	100	18.93	6.01	17.74	20.12
>3.18	95	18.30	7.45	16.78	19.82
Total	488	18.91	7.04	18.28	19.53