1model,estimate,se,ci_low,ci_high2unadjusted (main sample),-0.13169790632300882,0.014619618827634278,-0.1603518326928757,-0.103043979953141953adjusted for skill_index (main sample) [targets estimand],0.25353820594501253,0.009812212326345536,0.2343066231767153,0.272769788713309764unadjusted (all rows incl. negative hours),-0.13518960504279864,0.013896968221774055,-0.16242716225177342,-0.107952047833823875adjusted for skill_index (all rows incl. negative hours),0.25222449623309495,0.00947885217664965,0.23364628735208254,0.270802705114107376adjusted + quadratics (diagnostic),0.2420067817564457,0.028944809103468614,0.18527599837426012,0.298737565138631267