. 2014 Dec 8;44(3):20140245. doi: 10.1259/dmfr.20140245

Table 2.

Number of barrier perforations in each group

Groups	Technique	Inner barrier perforation	Outer barrier perforation	Perforations of both barriers	Perforation rate (%)	95% confidence interval	p-value^a
Group 1	0.04	58/100			58^b	0.48–0.68
Group 2	0.05	47/100			47^b,c	0.37–0.57
Group 3	0.06	35/100			35^c,d	0.25–0.45
Group 4	0.08	22/100			22^d	0.14–0.30	0.00
Group 5	0.04 + 0.04	25/100	35/100	24/100	25^c,d	0.16–0.34
Group 6	0.04 + finger cot	32/100	26/100	12/100	32^c,d	0.23–0.41

^{^a}

Obtained using one-way ANOVA.

^{^b,c,d}

The different characters show the statistically significant differences among the groups obtained using Scheffe's post comparison.