Table 2 Search strategy (conducted on 5 January 2015)

MEDLINE (n = 837)

1. exp Suicide/or suicid*.mp.

2. exp Self-injurious behavior/or self-harm.mp.

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

4. BMI.mp.

5. exp Body Weight/body weight.mp.

6. exp Obesity/or obes*.mp.

7. exp Overweight/or overweight.mp.

8. 1 or 2

9. 3 or 4 or 5 or 6 or 7

10. 8 and 9

11. limit 10 to humans

PsycINFO (n = 666)

1. exp Suicide/

2. exp Attempted Suicide/or attempted suicide.mp.

3. exp Suicidal Ideation/or suicidal ideation.mp.

4. suicid*.mp.

5. exp Self-Injurious Behavior/or self-harm.mp.

6. exp Body Mass Index/or body mass index.mp.

7. exp Body Weight/or body weight.mp.

8. exp Obesity/or obes*.mp.

9. BMI.mp.

10. exp Overweight/or overweight.mp.

11. 1 or 2 or 3 or 4 or 5

12. 6 or 7 or 8 or 9 or 10

13. 11 and 12

14. limit 13 to human

EMBASE (n = 3688)

1. exp suicidal behavior/or suicid*.mp.

2. exp automutilation/or self-harm*.mp.

3. exp body mass/body mass index.mp.

4. BMI.mp.

5. exp body weight/body weight.mp.

6. exp obesity/or obes*.mp.

7. overweight.mp.

8. 1 or 2

9. 3 or 4 or 5 or 6 or 7

10. 8 and 9

11. limit 10 to human

CINAHL (n = 144)

1. (MH “Suicide+”) OR “suicid*”

2. (MH “Self-Injurious Behavior”) OR “self-harm”

3. (MH Body Mass Index) OR “body mass index”

4. (MH “Body Weight+”) OR “body weight”

5. (MH “Obesity+”) OR “obes*”

6. “BMI”

7. “overweight”

8. 1 or 2

9. 3 or 4 or 5 or 6 or 7

10. 8 and 9 (limiters human)