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Table 3 Summary of the results of the review

From: Symptoms of gastroesophageal reflux disease in severely mentally retarded people: a systematic review

 

Difference between GERD and non GERD group

Sensitivity

 

Number of studies

Relation1

Level of evidence2

Number of studies

Range

median

GERD symptoms

      

Vomiting

5

yes

A

8

22–100

57

Rumination

3

yes

A

3

31–40

32

Regurgitation

4

no

A

5

29–46

32

Food refusal

3

no

A

4

29–49

38

Hematemesis

6

yes

A

8

4–41

17

Iron deficiency anemia

3

no

A

4

11–35

17

(Recurrent) pneumonia

3

no

A

4

16–52

25

COPD, bronchitis, asthma)

1

no

C

3

11–36

33

Respiratory symptoms

1

no

C

1

-

44

Stridor

1

no

C

1

-

24

Wheezing

1

Yes

C

1

-

43

Failure to thrive

3

+/-1

B

5

7–92

40

Adiposity

1

No

B

1

-

18

Dental erosion

2

Yes

A

2

59–75

67

Behavioral symptoms

      

Behavior problems

2

no

A

2

47–48

48

Automutilation

2

no

A

3

19–29

23

Aggression

2

no

A

2

19–23

21

Fear

1

no

A

1

-

11

Episodes of screaming

2

no

A

2

23–24

24

Depression

1

yes

A

1

-

17

Restlessness

2

no

A

2

19–23

21

Pain/irritability

2

+/-

C

3

34–52

44

Heartburn

1

no

C

2

9–12

11

Changed behavior

1

yes

B

1

-

70

Predisposing factors

      

Nonambulance

4

no

A

4

44–58

52

Scoliosis

4

no

A

4

31–50

49

Cerebral Palsy

5

yes

A

5

46–70

61

Use of anticonvulsive therapy

4

yes

A

4

46–72

63

Central Nervous System Disease

1

yes

A

1

-

45

IQ < 35

3

yes

A

3

80–88

82

Other factors

      

Sex (males)

3

no

A

3

56–60

58

Down's syndrome

2

no

A

2

11–13

12

Constipation

4

no

A

4

46–65

60

Melena

1

no

C

1

-

4

Nasogastric feeding

2

no

A

2

4–7

6

Gastrostomy feeding

2

+/-

A

2

11–16

14

  1. 1 Statistically significant relation between a characteristic and GERD. +/- indicates that results are contradictory.
  2. 2 Level A highest level of evidence, level B = intermediate level of evidence, C = lowest level of evidence.