Adjuvant zoledronic acid therapy for patients with early stage breast cancer: an updated systematic review and meta-analysis

Table 1 Assessment of eligible trials according to Jadad grading

Study	Random sequence generation	Random masking	Double-blind	Withdrawals and dropouts	Sum (Jadad score)
ABCSG-12 [15]	2	2	0	1	5
AZURE [14]	2	2	0	1	5
E-ZO-FAST [20]	1	2	0	1	4
Z-FAST [17]	1	0	0	1	2
ZO-FAST [16]	1	0	0	1	2
Leal et al., [19]	1	2	0	1	4
Aft et al., [18]	1	0	1	1	3
Talahashi et al., [22]	1	0	0	1	2

ISSN: 1756-8722