Table 1.

Results of multivariable logistic regression analyses evaluating factors predicting success of nasolacrimal probing

Variable	Eyes (n = 3009)	Successful probing n (%)	OR (95%CI)	P value
Age (months)
≤ 2	141	124 (87.94)	0.69 (0.40–1.78)	0.1717
3–6	1430	1307 (91.4)	1
7–9	634	568 (89.59)	0.81 (0.59–1.11)	0.1894
10–12	335	288 (85.97)	0.58 (0.40–0.83)	0.0027
13–15	169	129 (76.33)	0.30 (0.20–0.45)	< 0.0001
16–18	101	72 (71.29)	0.23 (0.15–0.37)	< 0.0001
19–21	64	45 (70.31)	0.22 (0.13–0.39)	< 0.0001
22–24	57	40 (70.18)	0.22 (0.12–0.40)	< 0.0001
> 24	78	51 (65.38)	0.17 (0.11–0.29)	< 0.0001
Type of obstruction
Unilateral	1859	1668 (89.73)	1
Bilateral	1150	956 (83.13)	0.56 (0.45–0.69)	< 0.0001
Gender
Girls	1410	1239 (87.87)	1
Boys	1599	1385 (86.62)	0.89 (0.72–1.11)	0.3036

OR Odds ratio, CI Confidence interval