Table 1.

Study characteristics by trial center.

Trial center	Randomly assigned	Stage at diagnosis	Estrogen receptor status	Daily tamoxifen dose, mg
South Sweden	1320	II	Any	20
South-East Sweden, stage I	524	I	Positive	40
South-East Sweden, stage II-IIIA	1167	II-IIIA	Any	40
Stockholm	811	I-IIIA	Any	40
Uppsala-Örebro	583	II	Any	20
North Sweden	205	Node positive	Any	40