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. Author manuscript; available in PMC: 2018 Jan 10.
Published in final edited form as: Int J Public Health. 2009;54(3):150–157. doi: 10.1007/s00038-009-7110-0
Final model: Level 1: ln [Physical activity freq+1] = β01Sex +β2Overweight+β3Sex*Overweight+β4Mother-child PA + ε0
Level 2: β0 = γ00 + γ01 (High PA Opp) + γ02(Spring)+ μ0
β1 = γ10 + γ11 (High PA Opp)
β2 = γ20 + γ21 (High PA Opp)
β3 = γ30 + γ31 (High PA Opp)
β4 = γ40