Table 1 Basic data on the patient.

Number of patients (n, male/female)

126 (51/75)

Age (years, mean ± SD)

63.40 ± 11.75

<65 (years, n)

51

≥65 (years, n)

75

Neer classification (n)

 3-part

57

 4-part

69

Smoking (n, with/without)

45/81

Diabetes mellitus (n, with/without)

30/96

Osteoporosis (n, with/without)

41/75

Rehabilitation methods (n)

 Formal rehabilitation exercises

49

 Remedial rehabilitation exercises

30

 Self-directed rehabilitation exercises

47