Independent variables Category d.f. / e.d.f. Parameter estimate SE Test statistic P
Parametric terms Z
Intercept 1 2.952 0.689 4.284 < 0.0001
Year (reference category = 2015) 2016 1 0.030 0.698 0.043 0.966
2017 1 -0.156 0.693 -0.225 0.822
Smoothed terms Chi2
J.day x 2015 18.94 278.4 < 0.0001
J.day x 2016 28.23 429.5 < 0.0001
J.day x 2017 27.29 292.2 < 0.0001