Table 2 VASs of the 7 studies included in the meta-analysis

Kalaivani V. [20], 2014

0.45 ± 1.35^b

4.16 ± 1.22^b

3.55 ± 0.90^b

4.92 ± 1.38^b

3.80 ± 0.97^b

3.48 ± 0.94^b

Bessa SS. [1], 2012

4 (0–10)^a

6 (3–10)^a

4 (1–10)^a

4 (1–10)^a

-

-

Imbelloni LE [21], 2010

-

-

-

-

-

-

Tzovaras G. [10], 2008

0 (0–4)^a

3 (0–8)^a

0 (0–6)^a

2 (0–7)^a

0 (0–4)^a

1 (0–6)^a

Ellakany M. [22], 2013

1.2 ± 1.2^b

2.3 ± 1.6^b

1.6 ± 1.4^b

3.4 ± 1.9^b

0.8 ± 0.7^b

2.3 ± 1.5^b

Bessa SS [23], 2010

5 (0–8)^a

5 (2–9)^a

2 (1–6)^a

3 (0–5)^a

2 (0–4)^a

2 (1–8)^a

Tiwari S [12], 2013

-

-

1 (0–4)^a

4 (1–7)^a

0 (0–2)^a

1 (0–4)^a