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Table 3 Over-dispersion for the calibration period and the validation period, by group of temperature indicators

From: A predictive model relating daily fluctuations in summer temperatures and mortality rates

   Over-dispersion
Group excluded from the full model Number of temperature variables Calibration period 1975–2002 Validation period 2003
Full model 29 2.10 3.67
- G1 t-5 28 2.10 3.67
- G1 t-1 27 2.10 3.67
- GCUM2' 26 2.10 3.32
- G1 t 25 2.10 3.36
- GCUM1 t-4 24 2.10 3.36
- G2' 22 2.10 3.33
- GCUM1 t-3 21 2.10 3.39
- GCUM2 20 2.10 3.34
- G1 t-4 18 2.11 3.33
- G1 t-3 16 2.11 3.33
- GCUM1 t-5 14 2.11 3.51
- GCUM1 t-1 12 2.12 4.55
- G1 t-2 10 2.13 4.28
- GCUM1 t-2 7 2.22 13.61
- GCUM1 t 4 2.73 67.49
- GMA 3 3.14 59.97
- G2 (= model M 0 ) 0 5.64 133.71
  1. The groups of temperature indicators were selected using the backward method.