Table 2.

Comparison of continuous variables between those without electrolyte derangement and those with electrolyte derangement. p value calculated using Student's t-test.

	No electrolyte derangement  n = 214	Electrolyte derangement  n = 66	p value
Mean age (years)	68.93 ± 10.35	73.41 ± 4.08	0.00
Mean preoperative serum sodium	141.47 ± 2.70	131.33 ± 2.26	0.00
Mean preoperative serum potassium	4.40 ± 0.42	4.13 ± 0.53	0.00
Mean preoperative serum creatinine	0.9 ± 0.19	0.8 ± 0.19	0.26
Mean postoperative serum sodium	138.19 ± 2.65	128.67 ± 5.78	0.00
Mean postoperative serum potassium	4.31 ± 0.34	4.10 ± 0.81	0.002
Mean resection time (min)	28.34 ± 14.64	42.50 ± 20.04	0.00
Mean volume of irrigant used (liters)	12.81 ± 7.57	23.55 ± 15.20	0.00
Mean weight of tissue resected (grams)	15.33 ± 9.74	41.59 ± 34.45	0.00