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Schema for Multicentre Trials

We use a study ID consisting of 3 components in the format XXXXXX.XXXX:

  • 2 digit study number
  • 4 digit site code
  • 4 digit randomisation number

Study IDs are stored as character values to ensure that zero place holders are not dropped. The randomisation number is assigned sequentially at each site after randomisation. A decimal point is placed between the site code and randomisation number. This allows sites to monitor their recruitment and ensures the ID can be easily converted to a numerical value if manipulations are required. The study number ensures that samples can be identified across studies.

The following site codes have been used in previous Australasian multicentre trials and have been retained for continuity:

 

Auckland City Hospital

9180

Middlemore Hospital

9584

Waikato Hospital

9382

Wellington Hospital

9687

Christchurch Hospital

9283

Dunedin Hospital

9485

Hawke’s Bay Hospital

9510

Whakatane Hospital

9675

North Shore Hospital

9820

Waitakere Hospital

9988

Tauranga Hospital (Bay of Plenty)

9320

 Mater Hospital, Brisbane4353 
 Royal Brisbane and Women’s Hospital4253
 Royal Women’s Hospital, Melbourne3120
 Hutt Hospital9610
 Nelson Hospital9220 
 Palmerston North Hospital9786 
 Whangarei Hospital9160 
 Taranaki Hospital9520 
 Southland Hospital9830 
 Gisborne Hospital9750 
 Greymouth Hospital9210 
Wairarapa Hospital 9670 
 Birthcare (Auckland)9185 
 Lower Hutt Hospital9610

Randomisation in multiple pregnancy

To deal with unit of analysis issues, there are two common solutions:

  1. Add a suffix where 0 is mother; infants are coded 1, 2 and 3 according to birth order in multiple pregnancy or 5 for singleton. A surviving twin would be coded as 1.
  2. Assign a separate "randomisation number" to the fetuses, e.g., start mothers at 1000 and babies at 5000.

Study Codes

 

 

10

PROVIDE 

11 

 HINT2

12

 hPOD

13 

 EYE-SPY

14

 GLOW

15 

 Dextrose Gel Audit

16

 Pulse Oximetry

17

 GEMS

18

 TARGET

19

 CHYLD

20

 DIAMOND
21pre-hPOD 
 22 ConSEPT
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