Gap finder

Search review questions

Each row is one question a systematic review asked: who, what, compared with what, and which outcome, with the effect it found and how certain that is. Words match anywhere in the field.

Limit to evidence status or GRADE (optional)

487 questions in 49 reviews · Breast Cancer

current versions
No studies 44 · 9%Ungraded 14 · 2.9%Very low 108 · 22.2%Low 128 · 26.3%Moderate 107 · 22%High 86 · 17.7%

Ungraded means an effect was reported without a GRADE rating; it is not a gap. No studies means the review found nothing to answer the question. The six categories are a display order, not a score.

QuestionEffectEvidenceStatus / GRADE
Any O‐BCS vs mastectomy
Cumulative local recurrence rate · women with primary breast cancer
Oncoplastic breast‐conserving surgery for women with primary breast cancer (2021) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded
Intervention NR
Overall survival · overweight and obese breast cancer survivors
Body weight management in overweight and obese breast cancer survivors (2020) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Breast cancer recurrence · overweight and obese breast cancer survivors
Body weight management in overweight and obese breast cancer survivors (2020) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Change in body weight · overweight and obese breast cancer survivors
Body weight management in overweight and obese breast cancer survivors (2020) · Cochrane
no estimate extracted13 studies · 1526 participantsLow
Intervention NR
Change in BMI · overweight and obese breast cancer survivors
Body weight management in overweight and obese breast cancer survivors (2020) · Cochrane
no estimate extracted11 studies · 1187 participantsLow
Intervention NR
Change in waist circumference · overweight and obese breast cancer survivors
Body weight management in overweight and obese breast cancer survivors (2020) · Cochrane
no estimate extracted8 studies · 1021 participantsLow
Intervention NR
Disease‐free survival ‐ not reported · overweight and obese breast cancer survivors
Body weight management in overweight and obese breast cancer survivors (2020) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Adverse events · overweight and obese breast cancer survivors
Body weight management in overweight and obese breast cancer survivors (2020) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Change in quality of life ‐ overall scales · overweight and obese breast cancer survivors
Body weight management in overweight and obese breast cancer survivors (2020) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Breast cancer recurrence · overweight and obese breast cancer survivors
Body weight management in overweight and obese breast cancer survivors (2020) · Cochrane
RR 1.95 [0.68, 5.6]4 studies · 281 participantsLow
Intervention NR
Change in body weight · overweight and obese breast cancer survivors
Body weight management in overweight and obese breast cancer survivors (2020) · Cochrane
no estimate extracted21 studies · 1751 participantsLow
Intervention NR
Change in BMI · overweight and obese breast cancer survivors
Body weight management in overweight and obese breast cancer survivors (2020) · Cochrane
no estimate extracted17 studies · 1353 participantsLow
Intervention NR
Change in waist circumference · overweight and obese breast cancer survivors
Body weight management in overweight and obese breast cancer survivors (2020) · Cochrane
no estimate extracted13 studies · 1193 participantsLow
Intervention NR
Disease‐free survival · overweight and obese breast cancer survivors
Body weight management in overweight and obese breast cancer survivors (2020) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Adverse events · overweight and obese breast cancer survivors
Body weight management in overweight and obese breast cancer survivors (2020) · Cochrane
RR 0.94 [0.76, 1.17]4 studies · 394 participantsHigh
Intervention NR
Change in quality of life ‐ overall scales · overweight and obese breast cancer survivors
Body weight management in overweight and obese breast cancer survivors (2020) · Cochrane
no estimate extracted10 studies · 867 participantsLow
Intervention NR
Overall survival · overweight and obese breast cancer survivors
Body weight management in overweight and obese breast cancer survivors (2020) · Cochrane
no estimate extractedNRNo studies
Exercise therapies vs standard care
Overall change in worst pain scores · women with aromatase inhibitor‐induced musculoskeletal symptoms (AIMSS)
Exercise therapies for preventing or treating aromatase inhibitor‐induced musculoskeletal symptoms in early… (2020) · Cochrane
no estimate extracted4 studies · 284 participantsVery low
Exercise therapies vs standard care
Overall change in stiffness scores · women with aromatase inhibitor‐induced musculoskeletal symptoms (AIMSS)
Exercise therapies for preventing or treating aromatase inhibitor‐induced musculoskeletal symptoms in early… (2020) · Cochrane
no estimate extracted1 study · 53 participantsLow
Exercise therapies vs standard care
Overall change in grip strength · women with aromatase inhibitor‐induced musculoskeletal symptoms (AIMSS)
Exercise therapies for preventing or treating aromatase inhibitor‐induced musculoskeletal symptoms in early… (2020) · Cochrane
no estimate extracted1 study · 83 participantsVery low
Exercise therapies vs standard care
Overall change in health‐related quality of life · women with aromatase inhibitor‐induced musculoskeletal symptoms (AIMSS)
Exercise therapies for preventing or treating aromatase inhibitor‐induced musculoskeletal symptoms in early… (2020) · Cochrane
no estimate extracted2 studies · 123 participantsVery low
Exercise therapies vs standard care
Overall change in cancer‐specific quality of life · women with aromatase inhibitor‐induced musculoskeletal symptoms (AIMSS)
Exercise therapies for preventing or treating aromatase inhibitor‐induced musculoskeletal symptoms in early… (2020) · Cochrane
no estimate extracted2 studies · 136 participantsVery low
Exercise therapies vs standard care
Adverse effects secondary to the intervention · women with aromatase inhibitor‐induced musculoskeletal symptoms (AIMSS)
Exercise therapies for preventing or treating aromatase inhibitor‐induced musculoskeletal symptoms in early… (2020) · Cochrane
no estimate extracted4 studies · 331 participantsLow
Exercise therapies vs standard care
Adherence to aromatase inhibitors · women with aromatase inhibitor‐induced musculoskeletal symptoms (AIMSS)
Exercise therapies for preventing or treating aromatase inhibitor‐induced musculoskeletal symptoms in early… (2020) · Cochrane
OR 2.43 [0.41, 14.63]2 studies · 224 participantsVery low
Indocyanine Green Angiography (ICGA) vs clinical evaluation
Mastectomy skin flap necrosis (number of women with mastectomy skin flap necrosis within 30 days after surgery) · women undergoing immediate breast reconstruction following mastectomy
Indocyanine green angiography for preventing postoperative mastectomy skin flap necrosis in immediate breast… (2020) · Cochrane
RR 0.79 [0.4, 1.56]3 studies · 573 participantsVery low
Indocyanine Green Angiography (ICGA) vs clinical evaluation
Infection (number of breasts with infection within 30 days after surgery) · women undergoing immediate breast reconstruction following mastectomy
Indocyanine green angiography for preventing postoperative mastectomy skin flap necrosis in immediate breast… (2020) · Cochrane
RR 0.65 [0.44, 0.97]NRVery low
Indocyanine Green Angiography (ICGA) vs clinical evaluation
Haematoma (number of breasts with haematoma within 30 days after surgery) · women undergoing immediate breast reconstruction following mastectomy
Indocyanine green angiography for preventing postoperative mastectomy skin flap necrosis in immediate breast… (2020) · Cochrane
RR 1.53 [0.47, 4.95]NRVery low
Indocyanine Green Angiography (ICGA) vs clinical evaluation
Seroma (number of breast with seroma within 30 days after surgery) · women undergoing immediate breast reconstruction following mastectomy
Indocyanine green angiography for preventing postoperative mastectomy skin flap necrosis in immediate breast… (2020) · Cochrane
RR 0.71 [0.37, 1.35]NRVery low
Indocyanine Green Angiography (ICGA) vs clinical evaluation
Reoperation (number of women that were operated again within 30 days after surgery) · women undergoing immediate breast reconstruction following mastectomy
Indocyanine green angiography for preventing postoperative mastectomy skin flap necrosis in immediate breast… (2020) · Cochrane
RR 0.5 [0.35, 0.72]4 studies · 613 participantsVery low
Indocyanine Green Angiography (ICGA) vs clinical evaluation
Dehiscence (number of women with dehiscence within 30 days after surgery). · women undergoing immediate breast reconstruction following mastectomy
Indocyanine green angiography for preventing postoperative mastectomy skin flap necrosis in immediate breast… (2020) · Cochrane
RR 4 [0.45, 35.45]1 study · 368 participantsVery low
Indocyanine Green Angiography (ICGA) vs clinical evaluation
Infection (number of women with infection of the skin flap or implant within 30 days after surgery) · women undergoing immediate breast reconstruction following mastectomy
Indocyanine green angiography for preventing postoperative mastectomy skin flap necrosis in immediate breast… (2020) · Cochrane
RR 0.91 [0.6, 1.4]4 studies · 613 participantsVery low
Indocyanine Green Angiography (ICGA) vs clinical evaluation
Haematoma (number of women with haematoma within 30 days after surgery) · women undergoing immediate breast reconstruction following mastectomy
Indocyanine green angiography for preventing postoperative mastectomy skin flap necrosis in immediate breast… (2020) · Cochrane
RR 0.87 [0.3, 2.53]2 studies · 459 participantsVery low
Indocyanine Green Angiography (ICGA) vs clinical evaluation
Seroma (number of women with seroma within 30 days after surgery) · women undergoing immediate breast reconstruction following mastectomy
Indocyanine green angiography for preventing postoperative mastectomy skin flap necrosis in immediate breast… (2020) · Cochrane
RR 1.68 [0.41, 6.8]2 studies · 408 participantsVery low
Indocyanine Green Angiography (ICGA) vs clinical evaluation
Mastectomy skin flap necrosis (number of breasts with mastectomy skin flap necrosis within 30 days after surgery) · women undergoing immediate breast reconstruction following mastectomy
Indocyanine green angiography for preventing postoperative mastectomy skin flap necrosis in immediate breast… (2020) · Cochrane
RR 0.62 [0.48, 0.82]NRVery low
Indocyanine Green Angiography (ICGA) vs clinical evaluation
Reoperation (number of breasts that needed to be operated again within 30 days after surgery) · women undergoing immediate breast reconstruction following mastectomy
Indocyanine green angiography for preventing postoperative mastectomy skin flap necrosis in immediate breast… (2020) · Cochrane
RR 0.65 [0.47, 0.92]NRVery low
Indocyanine Green Angiography (ICGA) vs clinical evaluation
Dehiscence ‐ not reported · women undergoing immediate breast reconstruction following mastectomy
Indocyanine green angiography for preventing postoperative mastectomy skin flap necrosis in immediate breast… (2020) · Cochrane
no estimate extractedNRNo studies
OFS vs no OFS
Overall survival (OS) Median · women with early breast cancer
Ovarian suppression for adjuvant treatment of hormone receptor‐positive early breast cancer (2020) · Cochrane
HR 0.86 [0.78, 0.94]11 studies · 10374 participantsHigh
OFS vs no OFS
Disease‐free survival (DFS) Median · women with early breast cancer
Ovarian suppression for adjuvant treatment of hormone receptor‐positive early breast cancer (2020) · Cochrane
HR 0.83 [0.77, 0.9]10 studies · 8899 participantsHigh
OFS vs no OFS
Toxicity ‐ hot flushes (a combination of "grade 3/4" and "any grade" toxicity) · women with early breast cancer
Ovarian suppression for adjuvant treatment of hormone receptor‐positive early breast cancer (2020) · Cochrane
RR 1.6 [1.41, 1.82]6 studies · 5581 participantsLow
OFS vs no OFS
Toxicity ‐ mood · women with early breast cancer
Ovarian suppression for adjuvant treatment of hormone receptor‐positive early breast cancer (2020) · Cochrane
no estimate extracted7 studies · 5354 participantsModerate
OFS vs no OFS
Toxicity ‐ bone health (osteoporosis defined by a T score < ‐2.5) · women with early breast cancer
Ovarian suppression for adjuvant treatment of hormone receptor‐positive early breast cancer (2020) · Cochrane
RR 1.66 [1.1, 2.5]1 study · 2011 participantsLow
OFS vs no OFS
Contralateral breast cancer · women with early breast cancer
Ovarian suppression for adjuvant treatment of hormone receptor‐positive early breast cancer (2020) · Cochrane
RR 0.75 [0.57, 0.97]8 studies · 7856 participantsModerate
OFS vs no OFS
Quality of life · women with early breast cancer
Ovarian suppression for adjuvant treatment of hormone receptor‐positive early breast cancer (2020) · Cochrane
no estimate extracted5 studies · 2996 participantsLow
Platinum vs non‐platinum regimens
Overall survival (OS) · women with metastatic triple‐negative breast cancer (mTNBC)
Platinum‐containing regimens for triple‐negative metastatic breast cancer (2020) · Cochrane
HR 0.85 [0.73, 1]6 studies · 958 participantsModerate
Intervention NR
Treatment discontinuation due to adverse event (safety population) · women with metastatic triple‐negative breast cancer (mTNBC)
Platinum‐containing regimens for triple‐negative metastatic breast cancer (2020) · Cochrane
RR 0.885 studies · 843 participantsModerate
Platinum vs non‐platinum regimens
Progression‐free survival/time to progression (PFS/TTP) · women with metastatic triple‐negative breast cancer (mTNBC)
Platinum‐containing regimens for triple‐negative metastatic breast cancer (2020) · Cochrane
HR 0.77 [0.68, 0.88]8 studies · 1077 participantsVery low
Platinum vs non‐platinum regimens
Objective tumour response rate (OTRR) (assessable participants) · women with metastatic triple‐negative breast cancer (mTNBC)
Platinum‐containing regimens for triple‐negative metastatic breast cancer (2020) · Cochrane
RR 1.4 [1.22, 1.59]10 studies · 1205 participantsLow
Intervention NR
Treatment‐related death (safety population) · women with metastatic triple‐negative breast cancer (mTNBC)
Platinum‐containing regimens for triple‐negative metastatic breast cancer (2020) · Cochrane
RR 1.065 studies · 843 participantsLow
Intervention NR
Nausea/vomiting* grade 3 or 4 (safety population) · women with metastatic triple‐negative breast cancer (mTNBC)
Platinum‐containing regimens for triple‐negative metastatic breast cancer (2020) · Cochrane
RR 4.773 studies · 655 participantsLow
Intervention NR
Nephrotoxicity (safety population) · women with metastatic triple‐negative breast cancer (mTNBC)
Platinum‐containing regimens for triple‐negative metastatic breast cancer (2020) · Cochrane
no estimate extractedNRNo studies