Table 3.

Patient variable associated with early stone formation. Multivariate analysis of associated patient factors comparing early vs late recurrent stone formers. Increased odds ratio indicates association with early stone former group. Statistically significant confidence intervals (p < 0.05) noted in bold.

Patient Variables Associated with Early Versus Late Stone Formation
	Odds Ratio	Confidence Interval (2.5–97.5%)
Gender (Female)	2.03	1.17–3.54
Race (Non-Caucasian)	0.83	0.46–1.47
BMI > 30	0.51	0.26–0.94
Family History of Nephrolithiasis	0.94	0.54–1.63
Infectious symptoms on Presentation	1.46	0.68–2.97
More than 1 prior stone episode	2.02	1.13–3.78