Table 1 Survival of adult females (a) and males (b) of Tenebrio molitor according to sex-ratio condition (Sex-ratio). The “simple” contrast was used for Sex-ratio (survival of males in the 50% of male condition was used as baseline). For females (a), a time-dependent procedure was used to account for the time-dependent effect of Sex-ratio on the risk of mortality (T × Sex-ratio). This procedure was not necessary for males as the effect of Sex-ratio on the risk of mortality was constant over time (b)
A. Variables | ba | s.e.b | Waldc | d.f. | pd | Odds ratioe |
Sex-ratio | 1.61 | 2 | 0.744 | |||
T × Sex-ratio | 9.77 | 2 | 0.008 | |||
75% of males vs 50% of males | 0.12 | 0.04 | 9.28 | 1 | 0.002 | 1.13 |
25% of males vs 50% of males | 0.00 | 0.02 | 0.05 | 1 | 0.831 | 1.00 |
75% of males vs 25% of males | 0.12 | 0.04 | 9.03 | 1 | 0.003 | 1.12 |
B. Variables | b | s.e. | Wald | d.f. | p | Odds ratio |
Sex-ratio | 21.34 | 2 | < 0.001 | |||
75% of males vs 50% of males | −0.38 | 0.10 | 15.36 | 1 | < 0.001 | 0.70 |
25% of males vs 50% of males | 0.15 | 0.17 | 0.82 | 1 | 0.366 | 1.16 |
75% of males vs 25% of males | −0.53 | 0.16 | 10.98 | 1 | 0.001 | 0.59 |