. Author manuscript; available in PMC: 2009 Feb 15.

Published in final edited form as: JPEN J Parenter Enteral Nutr. 2004;28(2):79–84. doi: 10.1177/014860710402800279

Table III.

Means, SDs, and intercorrelations for dependent and predictor variables used in the 2-hour multiple regression analyses

Dependent and predictor variables	Mean (SD)	Range	Intercorrelations
Dependent and predictor variables	Mean (SD)	Range	DV: Pepsin in secretions	1. Gastric pepsin	2. Visible blood
Dependent variable: pepsin concentration in tracheal secretions (μg/mL) at 2 hours	140.7 (99.3)	0.0–422.8	1.00
Predictor 1. Pepsin concentration of instilled gastric fluid (μg/mL)	352.2 (203.9)	13.6–925.2	.60^***	1.00
Predictor 2. Visible blood in secretions (0 = no, 1 = yes) at 2 hours	.27 (.44)	0–1	−.27^***	−.18^*	1.00
Predictor 3. Volume of tracheal secretions (mL) at 2 hours	0.24 (0.22)	0.005–2.000	−.10	−.07	.08

p < .05,

^***

p < .001;

DV, dependent variable.