Table 2.

Success of the procedure at various stages of the study.

Number of cases	All patients	End DCR	Balloon DCR	Z-test
Successful/total (%)	(n = 98)	(n = 49)	(n = 49)	(Z, p value)
At 3 months post-op
Total	90/98 (91.83)	44/49 (89.79)	46/49 (93.87)	(−0.74, 0.46)
95% CI (%)	84.72, 95.81	78.25, 95.56	83.48, 97.90
Fresh cases	83/87 (95.4)	41/44 (93.18)	42/43 (97.67)	(−1.00, 0.31)
Revision cases	07/11 (63.63)	03/05 (60)	04/06 (66.66)	(−0.23, 0.81)
At 06 months post-op
Total	87/98 (88.77)	43/49 (87.75)	44/49 (89.79)	(−0.32, 0.74)
95% CI (%)	81.02, 93.62	75.76, 94.27	78.25,95.56
Fresh cases	80/87 (91.95)	40/44 (90.9)	40/43 (93.02)	(−0.36,0.71)
Revision cases	07/11 (63.63)	03/05 (60)	04/06 (66.66)	(−0.22, 0.81)
At 12 months post-op
Total	85/98 (86.73)	42/49 (85.71)	43/49 (87.75)	(−0.29, 0.76)
95% CI (%)	78.61, 92.08	73.33,92.90	75.76, 94.27
Fresh cases	78/87 (89.65)	39/44 (88.63)	39/43 (90.69)	(−0.32, 0.75)
Revision cases	07/11 (63.63)	03/05 (60)	04/06 (66.66)	(−0.22, 0.81)

CI = confidence interval.