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Table 2 Results of itch score, PASI score, and DLQI questionnaire between intervention and control groups

From: The effect of Melissa officinalis syrup on patients with mild to moderate psoriasis: a randomized, double-blind placebo-controlled clinical trial

Variables

Intervention group (nā€‰=ā€‰47)

Placebo group (nā€‰=ā€‰48)

P-valuea

Meanā€‰Ā±ā€‰SD

Meanā€‰Ā±ā€‰SD

Ā 

Itch

Ā Ā Ā 

Ā Pre-treatment

6.34ā€‰Ā±ā€‰2.68

5.45ā€‰Ā±ā€‰2.55

0.104

Ā Post-treatment

3.45ā€‰Ā±ā€‰2.18

5.56ā€‰Ā±ā€‰2.81

ā€‰<ā€‰0.001

Ā p-valueb

<ā€‰0.001

0.886

Ā 

PASI

Ā Ā Ā 

Ā Pre-treatment

3.26ā€‰Ā±ā€‰3.58

2.95ā€‰Ā±ā€‰2.16

0.603

Ā Post-treatment

1.65ā€‰Ā±ā€‰2.17

3.36ā€‰Ā±ā€‰2.38

ā€‰<ā€‰0.001

Ā p-value

ā€‰<ā€‰0.001

0.002

Ā 

DLQI

Ā Ā Ā 

Ā Pre-treatment

67.63ā€‰Ā±ā€‰22.97

64.43ā€‰Ā±ā€‰23.66

0.503

Ā Post-treatment

74.37ā€‰Ā±ā€‰23.89

65.29ā€‰Ā±ā€‰23.74

0.065

Ā p-value

0.029

0.519

Ā 
  1. DLQI dermatology life quality index, PASI psoriasis area and severity index, SD standard deviation
  2. aP-value is calculated by the independent t-test
  3. bP-value is calculated by the Paired t-test