The implications of the glenoid angles and rotator cuff status in patients with osteoarthritis undergoing shoulder arthroplasty

Table 4 Preoperative Characteristics of 231 Shoulders from 202 Patients with Osteoarthritis Undergoing Shoulder Arthroplasty, by Inclination Angle and Rotator Cuff Status

Characteristic	Superior glenoid inclination angle
	High inclincation (≥ 10°)n = 105		Low inclincation (0° to 10°) n = 97		No inclincation (≤0°) n = 29
	Intact-cuff	Torn-cuff	Intact-cuff	Torn-cuff	Intact-cuff	Torn-cuff
Shoulders, n (%)	41 (39)	64 (61) ^a	67 (69.1)	30 (30.9) ^a	23 (79.3)	6 (20.7) ^a
Inclination angle, median (min/max), degrees	14 ^b (10/24)	14 ^b (10/56)	5^c (1/9)	6 ^c (1/9)	-5^d (−18/0)	−3 ^d (−23/0)
CSA angle, median (min/max), degrees	31.3 ^e (21.5/38.8)	37.8 ^e (21.9/61.6)	28.6 ^f (17.6/40.4)	32.6 ^f (23.9/43.0)	26.9 ^g (18.0/31.3)	36.7 ^g (27.4/49.7)

CSA critical shoulder angle
^a Difference between high inclination vs low inclination and no inclination, P < 0.001
^b Difference between intact-cuff and torn-cuff groups, P < 0.001
^c Difference between intact-cuff and torn-cuff groups, P = 0.114
^d Difference between intact-cuff and torn-cuff groups, P = 0.518
^e Difference between intact-cuff and torn-cuff groups, P < 0.023
^f Difference between intact-cuff and torn-cuff groups, P = 0.002
^g Difference between intact-cuff and torn-cuff groups, P < 0.001

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