Table 5

Quality of the reviews by type of health behaviour

Health

Behaviour

High quality

reviews

Well conducted

reviews

Reviews of

variable quality

Total


Type of evidence*

Potential for bias**

1

++

1&2

++

2

++

1

+

1&2

+

2

+

1

-

1&2

-

2

-


Smoking

8

3

0

14

10

1

6

3

3

48


Physical Activity

5

1

2

2

7

1

2

1

1

24


Alcohol

3

2

0

0

3

1

1

1

3

15


Healthy eating

0

0

0

1

12

0

0

1

0

13


Illicit drug use

1

1

0

0

0

0

0

1

1

4


Sexual risk taking

1

1

0

1

0

0

2

3

0

8


Notes: columns are not totalled because some reviews were included in more than one health behaviour

*Study designs included within the systematic reviews: 1 = RCT; 2 = non-RCT; 1&2 = include both study designs.

** ++ = low potential; - = high potential

Jepson et al. BMC Public Health 2010 10:538   doi:10.1186/1471-2458-10-538

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