Notes. The full table listing all 146 Cepheids is available via the CDS. $\dot{P}$ is measured at a significance exceeding 3σ for 80 (shown in Fig. 27. N_lit = 1 indicates that only one older literature epoch was available. ‘non-lin?’ indicates possible signs for non-linear period changes, ‘nonlinear’ indicates clear evidence for this. ‘noisy’ marks Δϕ sequences exhibiting high scatter. ‘3 points’ highlight stars with only few (3) epochs for determining $\dot{P}$. ‘biased’ indicates results where the fit result may be affected by non-linear trends or uneven weights; ‘biased?’ indicates results where this is less clearly the case.