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Table 2 The count of strata incorporated within the block-randomised 1:1 hypothermia / normothermia treatment allocation schedule

From: Statistical analysis plan for the POLAR-RCT: The Prophylactic hypOthermia trial to Lessen trAumatic bRain injury-Randomised Controlled Trial

Pre-hospital

Stratum no.

Hospital region

Stratum no.

Yesa

1

Victoriaa

5

Yesa

2

Western Australiaa

6

Yesa

3

Queenslanda

7

Yesa

4

Francea

8

No

 

Switzerland

9

No

 

Saudi Arabia

10

No

 

Qatar

11

No

 

Auckland

12

No

 

Waikato

13

  1. aParticipating pre-hospital ambulance services and their relevant regional hospitals within each of these Australia states and France were each included as separate strata within the computerised generation of randomisation envelopes