Table 1.

Demographics of acromial fracture.^6–29

First author	Year	Level of evidence	No. of fractures	No. of patients	Incidence (%)	Aetiology		Timing of fracture (months)	Age	Gender
						Stress	Trauma			F	M
Otto13	2013	IV	53	212	25	NS	NS	15.2	75	43	10
Teusink10	2014	IV	25	1018	2.5	NS	NS	16	72.2	21	4
Crosby6	2011	IV	22	400	5.5	17	5	10.7	71.1	16	6
Levy8	2013	IV	16	157	10.2	16	0	3	77	13	3
Dubrow14	2014	IV	14	125	11.2	all	0	5.1	72.1	12	2
Kurowicki15	2016	IV	9	72	12.5	NS	NS	NS	76	NS	NS
Kennon11	2017	IV	9	318	2.8	NS	NS	17	70	6	3
Hattrup30	2010	IV	9	125	7.2	4	5	10	76	8	1
Hamid7	2011	IV	8	173	4.6	6	2	34.4	76.3	8	0
Wahlquist12	2011	IV	5	97	5.2	5	0	8.4	74.2	4	1
Mollon17	2016	IV	5	297	1.7	5	0	NS	NS	NS	NS
Mellano18	2017	IV	5	100	5	NS	NS	NS	NS	NS	NS
Werner19	2005	IV	4	58	6.9	4	0	NS	NS	NS	NS
Walch9	2009	IV	4	457	0.9	3	1	7	72.3	NS	NS
Saltzman20	2014	IV	4	137	2.9	4	0	NS	NS	NS	NS
Greiner16	2015	I	4	34	11.8	NS	NS	NS	NS	NS	NS
Shafritz21	2012	IV	3	41	7.3	3	0	NS	NS	NS	NS
Boileau22	2005	IV	2	45	4.4	2	0	3	NS	NS	NS
von Engelhardt23	2015	IV	1	67	1.5	NS	NS	NS	NS	NS	NS
Simovitch24	2015	IV	1	41	2.4	1	0	6	NS	NS	NS
Kempton25	2011	IV	1	200	0.5	1	0	NS	NS	NS	NS
Groh26	2014	IV	1	112	0.9	NS	NS	10	71	1	0
Cuff27	2008	IV	1	96	1	0	1	3	NS	NS	NS
Bufquin28	2007	IV	1	43	2.3	1	0	12	NS	NS	NS
Atoun29	2014	IV	1	31	3.2	1	0	3	NS	NS	NS
Total (mean)	NA	NA	208	4456	4.7	73	14	12.7	73.8	132	30

F: female; M: male; NA: not applicable; NS: not specified.