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. Author manuscript; available in PMC: 2022 May 1.
Published in final edited form as: Breast Cancer Res Treat. 2021 Feb 16;187(1):135–144. doi: 10.1007/s10549-021-06100-2

Table 2.

Summary of the effect of ZOL treatment on clinical outcomes. Data are presented as number of events / number of patients in each group followed by hazard ratio and 95% confidence interval

Recurrence Bone Recurrence Non-Bone Recurrence Breast Cancer Survival Overall Survival
Age < 45, ER+/HER2− ZOL: 5/8
No ZOL: 3/14
HR 6.05
[1.26–29.1]
ZOL: 4/8
No ZOL: 2/14
HR 6.01
[0.97–37.1]
ZOL: 5/8
No ZOL: 2/14
HR 6.94
[1.26–38.1]
ZOL: 3/8
No ZOL: 2/14
HR 4.43
[0.62–31.7]
ZOL: 3/8
No ZOL: 2/14
HR 4.43
[0.62–31.7]
Age >= 45, ER+/HER2− ZOL: 9/18
No ZOL: 5/15
HR 1.95
[0.57–6.66]
ZOL: 3/18
No ZOL: 5/15
HR 0.78
[0.16–3.83]
ZOL: 8/18
No ZOL: 5/15
HR 1.53
[0.44–5.30]
ZOL: 8/18
No ZOL: 3/15
HR 2.71
[0.54–13.6]
ZOL: 9/18
No ZOL: 4/15
HR 2.13
[0.54–8.31]
Age 45–54, ER+/HER2− ZOL: 5/10
No ZOL: 3/9
HR 3.12
[0.51–19.0]
ZOL: 2/10
No ZOL: 3/9
HR 1.68
[0.15–18.9]
ZOL: 5/10
No ZOL: 3/9
HR 2.62
[0.46–15.0]
ZOL: 4/10
No ZOL: 1/9
HR 2.79
[0.19–40.8]
ZOL: 5/10
No ZOL: 2/9
HR 2.10
[0.30–14.9]
Age < 45, Triple-Negative ZOL: 3/7
No ZOL: 3/5
HR 0.89
[0.12–6.59]
ZOL: 2/7
No ZOL: 1/5
HR 0.49
[0.03–7.94]
ZOL: 3/7
No ZOL: 3/5
HR 0.89
[0.12–6.59]
ZOL: 2/7
No ZOL: 4/6
HR 0.31
[0.03–3.11]
ZOL: 2/7
No ZOL: 4/6
HR 0.31
[0.03–3.11]
Age >= 45, Triple-Negative ZOL: 6/13
No ZOL: 6/11
HR 0.53
[0.17–1.72]
ZOL: 2/13
No ZOL: 2/11
HR 0.54
[0.07–4.03]
ZOL: 5/13
No ZOL: 5/11
HR 0.47
[0.13–1.72]
ZOL: 5/13
No ZOL: 5/11
HR 0.53
[0.15–1.89]
ZOL: 6/13
No ZOL: 6/11
HR 0.52 [0.16–1.66]