. Author manuscript; available in PMC: 2016 Jul 25.

Published in final edited form as: Stat Med. 2015 Nov 3;35(11):1848–1865. doi: 10.1002/sim.6785

Table 2.

Parameter estimates (median and 95% interval) from four types of interaction models, using weekly central north HFMD data in China 2009–2010.

Parameter	Type I	Type II	Type III	Type IV
α	−1.08 (−1.26, −0.88)	−0.97 (−1.45, −0.48)	−0.84 (−1.31, −0.37)	−0.96 (−1.45, −0.46)
β	0.30 (0.14, 0.45)	0.15 (−0.12, 0.41)	0.33 (0.13, 0.52)	0.16 (−0.11, 0.42)

σ_γ	0.15 (0.12, 0.20)	0.17 (0.13, 0.21)	0.15 (0.12, 0.19)	0.15 (0.12, 0.19)
σ_ϕ	0.06 (0.04, 0.09)	0.06 (0.04, 0.09)	0.06 (0.04, 0.09)	0.06 (0.04, 0.09)
σ_u	0.13 (0.06, 0.46)	0.19 (0.06, 1.31)	0.13 (0.06, 0.50)	0.24 (0.07, 2.50)
σ_υ	0.51(0.43, 0.63)	0.45 (0.36, 0.57)	0.51 (0.42, 0.63)	0.44 (0.35, 0.56)

σ_b	4.01(3.87, 4.16)	0.50 (0.47, 0.53)	8.09 (7.78, 8.42)	0.83 (0.79, 0.89)