Critical shoulder angle combined with age predict five shoulder pathologies: a retrospective analysis of 1000 cases

Table 5 Patient characteristics potentially associated with five shoulder pathologies

Variable	Cuff tear arthropathy (CTA, n = 100)	Osteo- arthritis (OA, n = 100)	Rotator cuff tears (RCT, n = 100)	Impingement (IM, n = 100)	Tendinitis calcarea (TC, n = 100)	Comparison between groups
Gender (female/male)	75/25	67/33	48/52	44/56	73/27	p < 0.001^§
CTA vs. OA/RCT/IM/TC		p = 0.275^†	p < 0.001^†	p < 0.001^†	p = 0.872^†
OA vs. RCT/IM/TC			p = 0.010^†	p = 0.002^†	p = 0.441^†
RCT vs. IM/TC				p = 0.670^†	p < 0.001^†
IM vs. TC					p < 0.001^†
Shoulder side (right/left)	70/30	40/60	62/38	55/45	49/51	p < 0.001^§
CTA vs. OA/RCT/IM/TC		p < 0.001^†	p = 0.296^†	p = 0.041^†	p = 0.004^†
OA vs. RCT/IM/TC			p = 0.003^†	p = 0.047^†	p = 0.255^†
RCT vs. IM/TC				p = 0.389^†	p = 0.087^†
IM vs. TC					p = 0.479^†
Age (years)	74.7 ± 7.5	69.3 ± 9.7	64.6 ± 7.4	53.0 ± 10.7	47.1 ± 8.4	p < 0.001^§
	75 (55–89)	68 (44–91)	64 (48–80)	52.5 (29–79)	47 (30–66)
CTA vs. OA/RCT/IM/TC		p < 0.001^‡	p < 0.001^‡	p < 0.001^‡	p < 0.001^‡
OA vs. RCT/IM/TC			p < 0.001^‡	p < 0.001^‡	p < 0.001^‡
RCT vs. IM/TC				p < 0.001^‡	p < 0.001^‡
IM vs. TC					p < 0.001^‡
BMI (kg/m²)	28.4 ± 4.7	29.9 ± 5.1	27.9 ± 4.4	26.8 ± 4.9	25.2 ± 4.1	p < 0.001^§
	27.6 (19–43)	29.7 (20–48)	27.5 (19–41)	26.0 (18–42)	24.8 (18–43)
CTA vs. OA/RCT/IM/TC		p = 0.035^‡	p = 0.410^‡	p = 0.014^‡	p < 0.001^‡
OA vs. RCT/IM/TC			p = 0.003^‡	p < 0.001^‡	p < 0.001^‡
RCT vs. IM/TC				p = 0.081^‡	p < 0.001^‡
IM vs. TC					p = 0.018^‡

^† P values were calculated with Chi²-test or Fisher exact t-test. ^‡ P values were calculated with the independent t-test. ^§ P values were calculated using ANOVA

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