Table 4.

Parameters predicting success on univariate analysis

Variable	Odds ratio	95% CI	Likelihood ratio χ2	p Value
Age*	0.98	0.95–1.00	3.88	0.049
CBD diameter (mm)
<12	3.24	1.20–8.72	8.14	0.017
⩾12	1
No of stones
⩽2	2.08	0.90–4.80	7.5	0.024
>2	1
Size of stones (mm)
<10	10.0	2.24–44.64	17.72	<0.001
⩾10	1

*Decrease in success with year increase in age.

CI, confidence interval; CBD, common bile duct.