Table 2.

Characterizations of blood pressure variability and association with percent delta creatinine.

BP descriptor	P value for BP measure	Model r-square	Hemodynamic variable median (25th–75th percentile) (units are indicated in the first column)
AUC for 95/135 (mm Hg·min)	0.33	0.058	930 (424–2707)
AUC < 95 (mm Hg·min)	0.36	0.058	447 (130–1584)
AUC > 135 (mm Hg·min)	0.72	0.058	207 (71–443)
AUC for 20% (mm Hg·min-above + below)	0.08	0.059	2268 (702–5698)
AUC for 20% below baseline	0.09	0.059	2117 (509–5542)
AUC for 20% above baseline	0.74	0.058	5.07 (0–74)
Number of total incursions	0.31	0.058	13 (9–17)
Number of incursions >135	0.25	0.058	4 (2–6)
Number of incursions <95	0.57	0.058	9 (5–13)
Cumulative minutes >135 or <95 mm Hg (min)	0.42	0.058	17.7 (3.1–6.8)
Minutes >135 or <95 mm Hg per incident (min)	0.29	0.061	4.8 (3.3–7.8)
Cumulative minutes >135 mm Hg (min)	0.39	0.058	14 (6–25)
Minutes >135 mm Hg per incursion (min)	0.84	0.061	3.7 (2.3–5.7)
Cumulative minutes <95 mm Hg (min)	0.55	0.058	49 (18–116)
Minutes <95 mm Hg per incursion (min)	0.27	0.058	4.9 (2.8–10.8)
Mean incursion nadir <95 mm Hg	0.01	0.060	13 (9–17)
Mean incursion peak >135 mm Hg	0.56	0.058	21 (12–31)
Percent change below baseline (to minimum)	0.006	0.065	53 (62–43)
Percent change above baseline (to maximum)	0.51	0.063	24 (9–48)

All models are adjusted for aprotinin use, age, chf, previous mi, baseline creatinine, bypass time, diabetes, weight, valve surgery, gender, and pulse pressure. P values for these covariates are not shown.