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Table 3 Results of meta-analysis

From: Efficacy of combining oral Chinese herbal medicine and NB-UVB in treating psoriasis vulgaris: a systematic review and meta-analysis

Outcomes

RR (95 % CI), I2, NNT

 PASI-60 or above

 17 studies

1.35 (1.26, 1.45), I2 = 5 %, 4.27

  Studies with <8 (4–6) weeks treatment (five studies)

1.38 (1.22, 1.55), I2 = 0 %

  Studies with 8–12 weeks treatment (12 studies)

1.34 (1.23, 1.47), I2 = 16 %

  Studies with moderate to severe psoriasis (baseline PASI 14-20) (seven studies)

1.35 (1.17, 1.56), I2 = 45 %

  Studies using three common herbs (di huang, dang gui, tu fu ling) (six studies)

1.31 (1.16, 1.47), I2 = 22 %

  Studies using three common herbs (five studies, one study that used three formulae was excluded)

1.37 (1.22, 1.54), I2 = 0 %

  Studies with low risk on sequence generation (five studies)

1.39 (1.23, 1.58), I2 = 0 %

PASI-90 or above

 17 studies

1.71 (1.45, 2.01), I2 = 0 %, 5.92

NB-UVB-induced AEs

 12 studies

0.66 (0.46, 0.96), I2 = 53 %

  Studies with <8 (4–6) weeks treatment (four studies)

0.77 (0.42, 1.43), I2 = 62 %

  Studies with 8–12 weeks treatment (eight studies)

0.60 (0.38, 0.94), I2 = 46 %

  1. RR RISK ratio, NNT number need to treat