Table 5.

Adjusted IRR for infectious events by baseline calcium-phosphate product levela

Type of InfectionIRR (95% CI)
Unadjusted+Demographics+Clinical+Laboratory
All (mg2/dl2)n = 1003bn = 1003n = 944n = 935
    <551.00 (reference)1.00 (reference)1.00 (reference)1.00 (reference)
    ≥551.22 (1.08 to 1.37)c1.26 (1.11 to 1.42)c1.27 (1.12 to 1.45)c1.38 (1.21 to 1.59)c
    P for trend0.001c<0.001c<0.001c<0.001c
Sepsisn = 967bn = 967n = 908n = 902
    <551.00 (reference)1.00 (reference)1.00 (reference)1.00 (reference)
    ≥551.40 (1.07 to 1.82)c1.67 (1.26 to 2.21)c1.76 (1.31 to 2.36)c1.87 (1.36 to 2.57)c
    P for trend0.014c<0.001c<0.001c<0.001c
Pulmonaryn = 990bn = 990n = 925n = 916
    <551.00 (reference)1.00 (reference)1.00 (reference)1.00 (reference)
    ≥550.99 (0.79 to 1.25)1.08 (0.85 to 1.36)1.06 (0.82 to 1.35)1.06 (0.82 to 1.38)
    P for trend0.9630.5510.6700.648
Osteomyelitisn = 804bn = 804n = 755n = 749
    <551.00 (reference)1.00 (reference)1.00 (reference)1.00 (reference)
    ≥551.66 (1.05 to 2.62)c1.63 (1.01 to 2.64)c1.65 (0.98 to 2.79)1.78 (1.01 to 3.14)c
    P for trend0.029c0.045c0.0600.047c
  • a Demographics: age, gender, race; clinical: modality, ICED, smoking status; laboratory: albumin, creatinine, hemoglobin. Calcium levels corrected for albumin level.

  • b Observations in groups with no variation in outcome dropped in conditional modeling.

  • c P < 0.05.