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Table 3 Search strategy used in CNKI

From: Herbal medicine Shaofu Zhuyu decoction for primary dysmenorrhea: a systematic review protocol

Number Search items
1 Related to intervention 少腹逐瘀汤
2 Shaofu Zhuyu decoction
3 Shaofu Zhuyu formula
4 Shaofu Zhuyu tang
5 1 or 2–5
6 Related to disease 痛经
7 原发性痛经
8 月经痛
9 经期腹痛
10 经痛
11 Dysmenorrhea
12 Primary dysmenorrhea
13 Menstrual disorder
14 Pelvic pain
15 Menstruation disturbances
16 6 or 7–15
17 Related to study design 随机
18 对照
19 临床研究
20 Controlled trial
21 Randomized controlled trial
22 17 or 18–22
23 6 and 16 and 22