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Table 1 Details of survey methodology in each country together with school and public holiday+ periods within the sampling period ([6] and EURYDICE).

From: Estimating the impact of school closure on social mixing behaviour and the transmission of close contact infections in eight European countries

Country BE DE FI GB IT LU NL PL
Over what time period was the survey conducted? March-May 2006 January-February, May-July 2006 March-June 2006 April-May 2006 May-June 2006 May 2005, January-March, May 2006 February-September 2006 March-April 2006
Were participants instructed not to record professional contacts (eg, with clients) in the diary? Yes, if estimated at more than 20 Yes, if estimated at more than 10* Yes, if estimated at more than 10 No No No Yes, if estimated at more than 10 No
Maximum number of contact entries in the diary? 90 73 34 29 45 55 45 45
Holidays ** Year-2006 Winter holidays: 27/02-03/03, Spring time holidays/Easter: 03-17/03, Public holidays: 01/05, 25/05 Year-2006 Christmas/new year: 7 to 13 days staggered between 21/12-07/01, Winter holidays: 0 to 12 days staggered between 30/01-03/03, 3rd term holidays: 0 to 11 days staggered between 22/05-17/06, Summer: 6 weeks staggered between 26/06-16/09, Public holidays: 01/01, 01/05, 25/05, 05/06, 15/06 Year-2006 Winter holidays: 20/02-11/03, Spring time holidays/Easter:13-17/04, Summer: 03/06-mid August, Public holidays: 01/05, 25/05 Year-2006 1. England and Wales: Spring time holidays/Easter: 03-14/04 or 10-21/04, 2. Scotland Spring time holidays/Easter: 31/03-24/04 Public holidays: 01/05 Year-2006 Public holidays: 01/05, 02/06 Year-2005 14-21/05 Public holidays: 01/05, 05/05, Year-2006 Christmas/new year: 24/12-08/01, Winter holidays:25/02-05/03, Public holidays: 01/05,25/05 Year-2006 Winter holidays: 1. North/Central: 18/02-26/02, 2. South 25/02-05/03, 3rd term: 29/04-07/05, Summer: 01/07-03/09, Public holidays: 17/04, 30/04, 05/05, 25/05, 05/06, Year-2006 Spring time holidays/Easter: 13-18/04
  1. * Note that for DE no participants recorded more than 10 professional contacts.
  2. ** Holidays with in the sampling period.
  3. + Weekends inside or adjacent to a larger holiday period were considered as holiday period.