Characteristics

AIs group

Combination group

p value

N (%)

N (%)

Age (years)

≤40

>40

189 (62.0%)

116 (38.0%)

61 (59.8%)

41 (40.2%)

0.725

ER level

≤40%

40% - 70%

≥70%

115 (50.2%)

111 (36.4%)

41 (13.4%)

50 (49.0%)

30 (29.4%)

22 (21.6%)

0.078

Visceral metastasis

No

Yes

134 (43.9%)

171 (56.1%)

43 (42.2%)

59 (57.8%)

0.754

Adjuvant AIs

No

Yes

142 (46.6%)

163 (53.4%)

30 (29.4%)

72 (70.6%)

0.002*

Disease-free interval

≤24 months

>24 months metastasis

Liver

Lung

Bone

Local recurrence

173 (64.4%)

132 (35.6%)

57 (18.7%)

65 (21.2%)

187 (61.3%)

89 (29.2%)

53 (52.0%)

49 (48.0%)

16 (15.7%)

35 (34.3%)

65 (63.7%)

38 (37.2%)

0.402

0.514