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| Title and abstract | |
| Study type | Clearly define the study type (e.g., prospective, retrospective) |
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| Introduction | |
| Background | Scientific background and explanation of rationale |
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| Methods | |
| Participants | Previous therapeutic surgery: type (diagnostic, therapeutic), number, laparoscopy or laparotomy, endometriosis-related or not |
| Indication for surgery: pain, child wish completed, child wish uncompleted, child wish absent |
| Sample size and power calculation |
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| Interventions | Endometriosis staging according to ASRM classification; operation time; length of hospital stay; multidisciplinary team including details on which surgeon did which surgery; clear description of the surgical technique according to the following definitions: shaving: superficial peeling of bowel serosal and subserosal endometriosis (with diathermy or laser), superficial excision: selective excision of the bowel endometriosis lesion without opening of the bowel wall, full thickness disc excision: selective excision of the bowel endometriosis lesion with opening followed by closure of the bowel wall, and bowel resection anastomosis: resection of a bowel segment affected by endometriosis followed by anastomosis report type and number of concomitant procedures in detail |
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| Follow-up period | Define the period of follow-up (in months) |
| Details on the follow-up procedure (e.g., telephone interview, questionnaire, and clinical evaluation) |
| Patients lost during follow-up period |
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| Pain measurement | Define the method used for pain measurement: presurgery and postsurgery, number of patients using hormonal treatment at the time of pain assessment, 11-point numerical scale for the assessment of menstrual pain (dysmenorrhea), nonmenstrual pain, dyspareunia; use of other methods (interviews, questionnaires): provide full details. |
| Patient-based or doctor-based |
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| QOL measurement | Define the method used for QOL measurement (e.g., EHP-30, SF-36, and EQ-5D) |
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| Fertility rate | Number of patients with history of infertility |
| Number of patients wishing to conceive passively (wish for reservation/restoration of fertility during surgery, without well-defined child wish at the time of surgery); number of patients wishing to conceive actively with a well-defined child wish in the near future; number of patients wishing to conceive actively with a well-defined child wish in the distant future |
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| Recurrence rate | Define recurrence: (1) symptom recurrence based on patient history, but no proof of recurrence by imaging and surgery; (2) endometriosis recurrence based on imaging: in patients with or without symptoms (pain and infertility). Recurrence is then likely based on noninvasive imaging (e.g., ultrasound and MRI); (3) surgical reintervention without recurrence of endometriosis: in patients with recurrent symptoms, surgery without visual diagnosis of endometriosis, and with either normal pelvis or other abnormalities (e.g., adhesions); (4) recurrence of visual endometriosis without histological proof: during laparoscopy endometriosis is visually observed but either not biopsied or biopsied without histologically proven endometriosis; (5) recurrence of histologically proven endometriosis: during laparoscopy endometriosis is visually observed and confirmed histologically. Suspicious recurrent endometriosis is present if the criteria for categories 1 and 2 were met. Proven recurrent endometriosis is present if the criteria for categories 4 and 5 were met. Additional surgery without evidence for endometriosis is present if the criteria for category 3 are met. |
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| Statistical methods | Statistical methods used; life table analysis methods; handling of patients lost for follow-up |
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| Results | |
| Histological confirmation | Report degree of endometriosis invasion in bowel |
| Report the median length of the resected colorectal segments (in cm) |
| Report the median largest diameter of the lesions (in cm) |
| Report the number of positive margins over the number of resected bowel specimens; report the number of patients with at least one positive margin of the bowel resection specimen |
| Complications | Report all major complications and their clinical management [surgery (specify type of surgery), medical, and expectant] including rectovaginal fistulae, anastomotic leaks, postoperative stomas, abscesses, and postoperative bleedings in absolute numbers |
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| Fertility rate | Report cumulative pregnancy rate (life table analysis) |
| Number of women who conceived |
| Median time to conceive after surgery |
| Mode of conception: spontaneous or medically assisted conception (ovulation induction; intrauterine insemination with or without ovarian stimulation; assisted reproduction: IVF and ICSI; fresh cycle or cryocycle; egg reception or embryo reception) |
| Live birth rate; ectopic pregnancy rate, miscarriage rate, and clinical pregnancy rate |
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| Recurrence rate | Report cumulative recurrence rate (life table analysis) |
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| Discussion | |
| Interpretation | Interpretation of the results, taking into account study hypotheses, sources of potential bias or imprecision, and the dangers associated with the multiplicity of analyses and outcomes. |
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| Generalizability | External validity of the trial findings |
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| Overall evidence | General interpretation of the results in the context of current evidence |
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