Study ID	Links with studies in review	Brief details and commentary	Ready for inclusion?
Methods of non‐surgical management (including rehabilitation)
Initial treatment, including immobilisation
Immobilisation in sling for one week versus three weeks
Z‐TUp Martinez 2021	NCT03217344 (ongoing study)	RCT 143 participants Of 111; mean age 70 years Discrepancies between full report and abstract	No. Return to authors needed.
Continuing management (rehabilitation) after initial sling immobilisation
Pulsed electromagnetic field versus sham therapy
Z‐TUp Borda 2019	New	RCT 62 participants, mean age 69 years Incompletely reported	No. Abstract only. Need to get full report. Return to authors needed.
Comparisons of different categories of surgical intervention
Locking plate versus locking nail
Z‐TUp Boyer 2021	NCT01557413 (ongoing study)	RCT 99 participants Of 85, mean age 74 years Missing data for interim follow‐ups	No. Return to authors needed.
Z‐TUp Li 2020	New	RCT? 37 participants, mean age 66 years Some contradictions	No. Better translation required. Return to authors probably needed
Locking plate versus wire fixation
Z‐TUp Vijan 2020	New	Quasi‐RCT 30 participants, mean age 52 years Limited outcomes	Yes. New comparison (different wiring method).
Reverse total shoulder arthroplasty versus hemiarthroplasty
Z‐TUp Alvarez 2020	NCT02075476 (ongoing study)	RCT 40 participants; mean age 76 years Small discrepancies	No. Return to authors needed.
Z‐TUp Batar 2020	New	Quasi‐RCT 80 participants Of 58 in analysis, mean age 71 years. Serious discrepancies	No. Return to authors needed.
Z‐TUp Laas 2021	NTR3208 (study awaiting classification)	Multicentre RCT 33 participants, mean age 75 years Missing data including denominators	No. Return to authors needed.
Comparisons of different methods of performing, or types of, an intervention in the same category
Deltoid‐split approach versus deltopectoral approach for plate fixation
Z‐TUp Bhayana 2021	New	Quasi‐RCT 84 participants, mean age 45 years Missing data	No. Return to authors needed.
Anterosuperior approach versus deltopectoral approach for reverse total surgery arthroplasty
Z‐TUp Izquierdo‐Fernández 2021	New	Quasi‐RCT 40 participants Of 32, mean age 74 years Missing data	No. Return to authors needed.
Reverse total shoulder arthroplasty with anatomic stem angle 135 versus 155 degrees
Z‐TUp Hachem 2021	New	RCT 78 participants Of 40, mean age 74 years Interim analysis	No. Abstract report of first 40 cases.
Continuing management (including rehabilitation) after surgical intervention
Supervised rehabilitation of job‐specific task‐orientated exercises and occupational therapy versus general physiotherapy
Z‐TUp Monticone 2021	ISRCTN17996552 (ongoing study)	RCT 70 'working' participants, mean age 49 years	Yes. New comparison.
Robot‐assisted training plus conventional occupational and physical therapy versus conventional therapy only
Z‐TUp Kröger 2021	Nerz 2017 (ongoing study)	Multicentre RCT 48 participants, mean age 55 years	Yes. New comparison.