Table 4. Pairwise comparisons of mortality probabilities (as calculated using the Mayfield method), effect size and confidence intervals for the effect size (estimated using the survreg function) of D. melanogaster groups of varying level of inbreeding (ws: within-strain crosses, bs: between-strain crosses).

	Group	N	Daily mortality probability (%)	Effect size	Lower 95% CI (adjusted)	Upper 95% CI (adjusted)	Adjusted p-value
(1)	Inbred	332	5.8
	Hybrid F1 (ws)	430	1.4	−0.785	−1.006	−0.563	<0.001***
(2)	Inbred	332	5.8
	Hybrid F1 (bs)	405	0.2	−1.779	−2.353	−1.205	<0.001***
(3)	Inbred	332	5.8
	Hybrid F2 (ws)	430	4.9	−0.161	−0.328	0.007	0.061
(4)	Inbred	332	5.8
	Hybrid F2 (bs)	966	1.2	−0.762	−0.942	−0.582	<0.001***
(5)	Hybrid F1 (ws)	430	1.4
	Hybrid F1 (bs)	405	0.2	−0.994	−1.689	−0.299	0.005**
(6)	Hybrid F1 (ws)	430	1.4
	Hybrid F2 (ws)	1,586	4.9	0.624	0.420	0.828	<0.001***
(7)	Hybrid F1 (bs)	430	0.2
	Hybrid F2 (bs)	966	1.2	1.017	0.355	1.680	0.003**
(8)	Hybrid F2 (ws)	1,586	4.9
	Hybrid F2 (bs)	966	1.2	−0.601	−0.752	−0.450	<0.001***
(9)	Inbred	332	5.8
	Outbred	507	2.0	−0.559	−0.742	−0.376	<0.001***
(10)	Hybrid F1 (ws)	430	1.4
	Outbred	507	2.0	0.226	−0.229	0.680	0.33
(11)	Hybrid F1 (bs)	405	0.2
	Outbred	507	2.0	1.220	0.589	1.851	<0.001***
(12)	Hybrid F2 (ws)	1,586	4.9
	Outbred	507	2.0	−0.398	−0.562	−0.234	<0.001***
(13)	Hybrid F2 (bs)	966	1.2
	Outbred	507	2.0	0.203	−0.135	0.540	0.24