Table 2.

(Left) Final performance metrics on the histopathology dataset

Method	Accuracy	Macro-accuracy
Regular	0.734 ± 0.105	0.703 ± 0.132
AvgPush	0.776 ± 0.080	0.790 ± 0.076
CWT	0.769 ± 0.087	0.783 ± 0.087
FedAvg	0.786 ± 0.086	0.767 ± 0.109
FML	0.774 ± 0.085	0.770 ± 0.010
ProxyFL	0.808 ± 0.075	0.811 ± 0.081
Joint	0.905 ± 0.030	0.913 ± 0.026

Client	Privacy Guarantees
	σ = 1.4, δ = 10−5
C1	ϵ = 2.36
C2	ϵ = 2.17
C3	ϵ = 2.08
C4	ϵ = 2.12
Joint	ϵ = 1.00

(Right) Privacy guarantees for each client based on the training set sizes in Table 1. The guarantees are the same across all methods. This table reports mean and standard deviation over 4 clients for each of 15 independent runs. Source data are provided as a Source Data file.