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Table 1 Pooled data passed from a node to the Analytical Center. We assume a 1:1 matched design. Here V1 i(1) (V2 i(1))denotes the pooled level of variable 1 (variable 2) for the ith case pool and V1 i(0) (V2 i(0))denotes the pooled level of variable 1 (variable 2) for the ith control pool within the node, i = 1, 2, …, k, where each pool consists of either g cases or g matched controls

From: Addressing data privacy in matched studies via virtual pooling

Pool id

Pooled Covariate V1

Pooled Covariate V2

Pooled Covariate …

 

Case

Control

Case

Control

Case

Control

1

V1 1(1)

V1 1(0)

V2 1(1)

V2 1(0)

â‹®

â‹®

â‹®

â‹®

â‹®

⋱

â‹®

â‹®

â‹®

i

V1 i(1)

V1 i(0)

V2 i(1)

V2 i(0)

â‹®

â‹®

â‹®

â‹®

â‹®

⋱

â‹®

â‹®

â‹®

k

V1 k(1)

V1 k(0)

V2 k(1)

V2 k(0)

â‹®

â‹®