Table 7 The risk ratio of having the opinion that spinal manipulative therapy is safe or harmful, respectively, if a ‘yes’ was obtained in the individual AMSTAR items (118 reviews)

AMSTAR #1

1.4

(1.0 to 2.1)

0.109

–

AMSTAR #2

1.4

(1.0 to 2.1)

0.091

0.2

(0.1 to 1.0)

0.025

AMSTAR #3

1.0

(0.6 to 1.6)

0.964

1.8

(0.4 to 7.6)

0.386

AMSTAR #4

1.2

(0.8 to 1.8)

0.436

0.4

(0.1 to 1.7)

0.178

AMSTAR #5

1.8

(1.2 to 2.5)

0.005

0.2

(0.0 to 1.2)

0.038

AMSTAR #6

1.5

(0.7 to 3.6)

0.252

1.7

(0.2 to 12.1)

0.566

AMSTAR #7

3.2

(1.4 to 7.2)

<0.001

0.1

(0.0 to 0.2)

<0.001

AMSTAR #8

1.8

(1.1 to 3.0)

0.014

0.1

(0.0 to 0.3)

<0.001

AMSTAR #9

2.2

(0.8 to 5.8)

0.152

0.5

(0.1 to 3.9)

0.528

AMSTAR #10

2.0

(1.6 to 2.4)

0.331

–

AMSTAR #11

1.6

(1.0 to 2.5)

0.109

–