Amount of fluid, mL | Amount of fluid per body weight, mL/kg | |||||||
---|---|---|---|---|---|---|---|---|
BMI <25 (n = 276) | BMI 25 to <30 (n = 209 | BMI ≥30 (n = 245) | P value | BMI <25 (n = 276) | BMI 25 to <30 (n = 209) | BMI ≥30 (n = 245) | P value | |
Predicted body weighta, kg | 67 ± 2.1 | 64 ± 0.7 | 61 ± 1.0 | 0.003b | - | - | - | |
Day 1 | ||||||||
Intake | 11,000 ± 310 | 10,500 ± 360 | 10,500 ± 310 | 0.27 | 180 ± 5 | 130 ± 5 | 100 ± 3 | <0.0001b |
Output | 4,100 ± 200 | 3,900 ± 240 | 3,900 ± 190 | 0.7 | 60 ± 3 | 50 ± 3 | 40 ± 2 | <0.0001b |
Net accumulated balance | 7,000 ± 330 | 6,600 ± 360 | 6,700 ± 330 | 0.43 | 110 ± 5 | 84 ± 5 | 70 ± 3 | <0.0001b |
Day 2 | ||||||||
Intake | 16,000 ± 420 | 15,200 ± 500 | 15,400 ± 420 | 0.28 | 250 ± 7 | 190 ± 6 | 150 ± 5 | <0.0001b |
Output | 6,500 ± 270 | 6,400 ± 320 | 6,400 ± 290 | 0.95 | 100 ± 5 | 80 ± 4 | 60 ± 3 | <0.0001b |
Net accumulated balance | 9,500 ± 430 | 8,800 ± 490 | 9,000 ± 460 | 0.28 | 150 ± 7 | 110 ± 6 | 90 ± 5 | <0.0001b |
Day 3 | ||||||||
Intake | 19,900 ± 520 | 19,000 ± 600 | 19,400 ± 510 | 0.37 | 320 ± 9 | 240 ± 8 | 190 ± 5 | <0.0001b |
Output | 9,100 ± 360 | 8,900 ± 410 | 9,300 ± 410 | 0.95 | 140 ± 6 | 110 ± 5 | 90 ± 4 | <0.0001b |
Net accumulated balance | 10,800 ± 490 | 10,200 ± 580 | 10,200 ± 540 | 0.31 | 170 ± 8 | 130 ± 7 | 100 ± 5 | <0.0001b |
Day 4 | ||||||||
Intake | 23,600 ± 590 | 23,000 ± 710 | 23,300 ± 590 | 0.41 | 380 ± 10 | 290 ± 9 | 230 ± 7 | <0.0001b |
Output | 12,000 ± 430 | 12,300 ± 530 | 12,600 ± 530 | 0.9 | 190 ± 7 | 160 ± 7 | 120 ± 6 | <0.0001b |
Net accumulated balance | 11,700 ± 540 | 10,700 ± 660 | 10,700 ± 600 | 0.17 | 190 ± 9 | 140 ± 8 | 110 ± 6 | <0.0001b |