Table 3.

CKD–specific ambulatory care sensitive condition hospitalizations by high-use status

Encounter- and Patient-Level CharacteristicAll, n=57,007Persistently High Use, n=947Episodic High Use, n=7010Nonhigh Use, n=49,050
Encounter-level analysis
 Total no. of hospital encounters118,671891331,79677,962
 Total no. of ACSC encounters regardless of type (proportion of all hospital encounters)24,804 (20.9)2593 (29.1)8681 (27.3)13,530 (17.3)
 Proportion of all ACSC encounters, n=24,80410010.535.054.5
 Cumulative length of stay of ACSC encounters, median (IQR)20 (9–48)47.5 (20–91)32 (15–66)16 (7–39)
 Total no. of hospital days for ACSC encounters, proportion of total (%)830,841 (100)58,102 (7.0)244,987 (29.5)527,752 (63.5)
 Heart failure encounters22,954 (19.3)2412 (27.1)8124 (25.6)12,418 (15.9)
 Hyperkalemia encounters2517 (2.1)255 (2.9)796 (2.5)1466 (1.9)
 Volume overload encounters419 (0.4)51 (0.6)133 (0.4)235 (0.3)
 Malignant hypertension encounters52 (0.0)5 (0.1)10 (0.0)37 (0.1)
Patient-level analysis
 Proportion of patients with at least one ACSC hospitalization regardless of type14,131 (24.8)610 (64.4)3397 (48.5)10,124 (20.6)
 Proportion of patients with an ACSC encounter related to heart failure12,904 (22.6)556 (58.7)3129 (44.6)9219 (18.8)
 Proportion of patients with an ACSC encounter related to hyperkalemia2225 (3.9)180 (19.0)652 (9.3)1393 (2.8)
 Proportion of patients with an ACSC encounter related to volume overload395 (0.7)44 (4.7)121 (1.7)230 (0.5)
 Proportion of patients with an ACSC encounter related to malignant hypertension50 (0.1)5 (0.5)9 (0.1)36 (0.1)
  • ACSC, ambulatory care sensitive condition; IQR, interquartile range.