Table 3

Statistical parameters for firing activity (Fig. 2)

ParameterBreslow–Day test for independenceMantel–Haenszel χ2
Proportion firingχ2 = 1.285, df=1, p =0.257χ2 = 0.069, df=1, p =0.7932
ParameterAgePNA treatmentInteraction
Firing frequencyDiff −0.193
[CI −0.537, 0.151]
Diff −0.104
[CI −0.448, 0.240]
Diff 0.130
[CI −0.558, 0.819]
F(1,66) = 1.251; p =0.267F(1,66) = 0.362;
p =0.549
F(1,66) = 0.143;
p =0.707
• Independence of treatment and age with firing proportion was assessed with Breslow–Day test. This was followed by the Mantel–Haenszel χ2 test with continuity correction to determine the effect of treatment on firing proportion when controlling for age (Simonoff, 2003). A two-way ANOVA was conducted for firing frequency.