Parameter | Breslow–Day test for independence | Mantel–Haenszel χ^{2} | |
---|---|---|---|

Proportion firing | χ^{2} = 1.285, df = 1, p = 0.257 | χ^{2} = 0.069, df = 1, p = 0.7932 | |

Parameter | Age | PNA treatment | Interaction |

Firing frequency | Diff −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 = 0.267 | F_{(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 χ

^{2}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.