Table 4 Comparison of complication rates following Total Knee Arthroplasty between Dehydration Status Cohorts in elderly subgroup

Non-home discharge

1.068 (< 0.001***)

1.068–1.068

1.151 (< 0.001***)

1.151–1.152

Infection

1.062 (0.447)

1.061–1.063

0.865 (0.169)

0.864–0.866

Cardiac arrest or MI

1.023 (0.877)

1.021–1.024

1.026 (0.882)

1.024–1.024

Wound disruption

1.150 (0.408)

1.148–1.152

0.757 (0.242)

0.755–0.759

Pneumonia

1.043 (0.760)

1.041–1.045

1.130 (0.442)

1.128–1.133

Unplanned intubation

1.042 (0.827)

1.040–1.045

1.102 (0.660)

1.099–1.105

Pulmonary embolism

1.001 (0.995)

0.999–1.002

1.023 (0.860)

1.021–1.024

On ventilator > 48 h

1.038 (0.891)

1.035–1.042

0.757 (0.454)

0.753–0.760

Progressive renal insufficiency

0.903 (0.703)

0.900–0.906

1.675 (0.049*)

1.669–1.680

Acute renal failure

0.782 (0.532)

0.778—0.785

0.825 (0.678)

0.820–0.829

Urinary tract infection

1.325 (< 0.001***)

1.32–1.326

1.231 (0.040*)

1.229–1.232

Stroke

1.020 (0.934)

1.017–1.023

1.075 (0.789)

1.072–1.079

Postoperative transfusion

1.069 (0.100)

1.069–1.070

1.296 (< 0.001***)

1.296–1.297

DVT

0.985 (0.866)

0.984–0.986

1.218 (0.054)

1.216–1.219

Sepsis

1.335 (0.083)

1.332–1.337

1.110 (0.626)

1.108–1.113

Septic shock

0.979 (0.940)

0.975–0.82

0.852 (0.657)

0.848–0.856

C. diff

0.535 (0.067)

0.535–0.533

0.712 (0.362)

0.708–0.715

Periprosthetic fracture

0.920 (0.619)

0.918–0.922

0.898 (0.598)

0.896–0.900

Length of stay > 2 d

1.035 (0.041*)

1.035–1.035

1.113 (< 0.001***)

1.113–1.113