Table 1 Search strategy

EMBASE (1974 to present)

1. Acute kidney injury.mp. or acute kidney failure/

2. body mass.mp. or body mass/

3. obesity/ or morbid obesity/

4. obesity.mp.

5. morbid obesity.mp.

6. sarcopenic obesity.mp. or sarcopenic obesity/

7. overweight.mp.

8. underweight.mp. or underweight/

9. body weight.mp. or body weight/

10. mortality/ or mortality.mp.

11. mortality rate/ or mortality rate.mp.

12. death rate.mp.

13. survival.mp. or survival/

14. survival rate.mp. or survival rate/

15. 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9

16. 10 or 11 or 12 or 13 or 14

17. 1 and 15 and 16

18. limit 17 to (adult < 18 to 64 years> or aged < 65+ years>)

MEDLINE

1. Acute kidney injury.mp. or Acute Kidney Injury/

2. acute renal failure.mp.

3. body mass index.mp. or Body Mass Index/

4. Body Weight/ or body mass.mp.

5. overweight.mp. or Overweight/

6. underweight.mp. or Thinness/

7. Obesity/ or obesity.mp.

8. morbid obesity.mp. or Obesity, Morbid/

9. obese.mp.

10. mortality.mp. or Mortality/

11. mortality rate.mp.

12. death rate.mp.

13. Survival/ or survival.mp.

14. survival rate.mp. or Survival Rate/

15. 1 or 2

16. 3 or 4 or 5 or 6 or 7 or 8 or 9

17. 10 or 11 or 12 or 13 or 14

18. 15 and 16 and 17

19. exp. Adult/ or adult.mp.

20. ((year* or age*) adj2 eighteen).af.

21. “18 year* .af.”

22. “age* 18 .af.”

23. 19 or 20 or 21 or 22

24. 18 and 23

CINAHL

1. (“acute kidney injur*”).ti,ab

2. (“acute renal failure”).ti,ab

3. “KIDNEY FAILURE, ACUTE”/

4. (1 OR 2 OR 3)

5. (“body mass index”).ti,ab

6. (BMI).ti,ab

7. (“body mass”).ti,ab

8. (obesity).ti,ab

9. (obese).ti,ab

10. (overweight).ti,ab

11. (underweight).ti,ab

12. (thin*).ti,ab

13. (weight).ti,ab

14. “BODY WEIGHT CHANGES”/

15. “BODY WEIGHT”/

16. “BODY MASS INDEX”/

17. “OBESITY, MORBID”/

18. OBESITY/

19. THINNESS/

20. (5 OR 6 OR 7 OR 8 OR 9 OR 10 OR 11 OR 12 OR 13 OR 14 OR 15 OR 16 OR 17 OR 18 OR 19)

21. (mortality).ti,ab

22. (survival).ti,ab

23. MORTALITY/

24. “HOSPITAL MORTALITY”/

25. (21 OR 22 OR 23 OR 24)

26. (4 AND 20 AND 25)

27. (adult).af

28. exp ADULT/

29. ((18 OR eighteen) ADJ3 (age* OR year*)).af

30. (27 OR 28 OR 29)

31. (20 AND 25 AND 26 AND 30)

Cochrane Central Register of Controlled Trials (CENTRAL)

Acute kidney injury: ti,ab,kw

Acute kidney failure: ti,ab,kw

“acute renal failure”: ti,ab,kw

MeSH descriptor: [acute kidney injury] noexp.

#1 OR #2 OR #3 OR #4

Body mass index: ti,ab,kw

Body weight: ti,ab,kw

MeSH descriptor: [Body mass index] exp.

MeSH descriptor: [Body weight] noexp.

#6 OR #7 OR #8 OR #9

#5 AND #10