Table 2.

Summary of definitions of adverse events

Author	Event term	Event definition
Handoll (2015) [13]	Avascular necrosis (score 2–0)	Score 2 = no changes/1 = changes to normal trabecular organisation < 50% of humeral head/0 = > 50% of humeral head or partial collapse
Handoll (2015) [13]	Secondary varus displacement	> 10°
Kancherla (2017) [39]	Tuberosity displacement	> 5 mm.
Fang (2017) [29]	Loss of power in arm (grade 0–5)	Medical Research Council Scale (grade 0–5) [47]
Papakonstantinou (2017) [41]	Delayed union/non-union/prolonged delayed union	Union between 61 and 89 days/when fractures had not united by 90 days/union after 90 days
Papakonstantinou (2017) [41]	Varus malunion	Neck-shaft angle ≤110°
Papakonstantinou (2017) [41]	Non-union (indirect definition)	Presence of callus uniting the main fragments of fractures in 3 of the 4 bone cortices