Table 3.

Comparing serum phosphorus level according to use of mechanical ventilation.

			P		Total
			Normophophatemia	Hypophosphatemia
MV:	No	Count	16	16	32
		% within P7s	84.2%	51.6%	64.0%
	Yes	Count	3	15	18
		% within P7s	15.8%	48.4%	36.0%
Total		Count	19	31	50
		% within P7s	100.0%	100.0%	100.0%

X² = 5.43 P = 0.02 (S).

MV, mechanical ventilator. S, significant.