Table 1 Summary of included studies
From: Risk of endometrial polyps in women with endometriosis: a meta-analysis
Author, year, place | Study population | Study design | Cases | Controls | Parameter measured | Result |
|---|---|---|---|---|---|---|
McBean, 1996, USA | Women who had a HSG, hysteroscopy, and laparoscopy | Case–control | 32 women with hysterosalpingograms proved polyps or polypoid endometrium | 88 women with hysterosalpingograms proved absence of polyps or polypoid endometrium | Number of patients with endometriosis | Cases: 27; controls: 19 |
Mi Ran Kim, 2003, Korea | Infertile women undergoing laparoscopy | Cohort | 92 (mean age, 30.6 ± 3.9 years) had laparoscopy-proved endometriosis | 91 (mean age, 30.8 ± 4.6 years) had laparoscopy-proved absence of endometriosis | Number (%) of patients with endometrial polyps | Cases: 43 (46.7 %); controls: 15 (16.5 %) |
Shuyun Zhao, 2006, China | Infertile women undergoing laparoscopy or laparotomy | Cohort | 94 (mean age, 30.6 ± 4.07 years) had laparoscopy-proved endometriosis | 98 (mean age, 30.8 ± 3.4 years) had laparoscopy-proved chronic pelvic inflammation; 116 (mean age, 30.7 ± 2.61 years) had laparoscopy-proved normal pelvic | Number (%) of patients with endometrial polyps | Cases: 20 (21.3 %); chronic pelvic inflammation: 4 (4.1 %); normal pelvic: 4 (3.4 %) |
Jae Sun Park, 2009, Korea | Infertile women undergoing laparoscopy | Cohort | 434 (mean age, 31.38 ± 4.37 years) had laparoscopy-proved endometriosis | 197 (mean age, 31.05 ± 5.48 years) had laparoscopy-proved the absence of endometriosis | Number (%) of patients with endometrial polyps | Cases: 274 (63.0 %); controls: 58 (29.8 %) |
Licong Shen, 2011, China | Infertile women undergoing simultaneous laparoscopy and hysteroscopy | Cohort | 158 (mean age, 31.0 ± 4.2 years) had laparoscopy-proved endometriosis | 273 (mean age, 30.7 ± 5.3 years) had no endometriotic foci found during laparoscopy | Number (%) of patients with endometrial polyps | Cases: 108 (68.35 %); controls: 56 (20.51 %) |
Yubin Li, 2011, China | Infertile women aged 21–42 years undergoing laparoscopy and hysteroscopy | Cohort | 84 (mean age, 30.87 ± 4.5 years) had laparoscopy-proved endometriosis | 160 (mean age, 30.87 ± 4.5 years) had laparoscopy-proved the absence of endometriosis | Number (%) of patients with endometrial polyps | Cases: 16 (19.0 %); controls: 12 (7.5 %) |
Hong Jin, 2013, China | Women undergoing surgery or physical examination | Cohort | 150 aged 23–53 (mean age, 41.8 years) had surgery and pathology proved endometriosis | 158 aged 23–53 (mean age, 39.11 years) had ultrasound proved the absence of endometriosis | Number (%) of patients with endometrial polyps | Cases: 23 (15.33 %); controls: 10 (6.33 %) |
Fuqin Li, 2013, China | Infertile women aged 20–42 years undergoing laparoscopy and hysteroscopy | Cohort | 42 (mean age, 28.5 ± 2.5 years) had laparoscopy-proved endometriosis | 78 (mean age, 28.5 ± 2.5 years) had laparoscopy-proved the absence of endometriosis | Number (%) of patients with endometrial polyps | Cases: 8 (19.0 %); controls: 4 (5.1 %) |
Yanru Li, 2013, China | Infertile women, aged 20–42 years undergoing laparoscopy and hysteroscopy | Cohort | 81 (mean age, 29.5 ± 4.71 years) had laparoscopy-proved endometriosis | 110 (mean age, 29.5 ± 4.71 years) had laparoscopy-proved the absence of endometriosis | Number (%) of patients with endometrial polyps | Cases: 17 (21 %); controls: 8 (7.3 %) |
Gaixiang Xu, 2014, China | Infertile women undergoing simultaneous laparoscopy and hysteroscopy | Cohort | 119 (mean age, 31.1 ± 3.0 years) had laparoscopy-proved endometriosis | 241 (mean age, 30.7 ± 4.1 years) had laparoscopy-proved the absence of endometriosis | Number (%) of patients with endometrial polyps | Cases: 77 (64.7 %); controls: 51 (21.16 %) |