Table 1

The mean differences in ln(Pdc ) between the two levels of each categorical variable estimated by fitting a two factor fixed effects models to the fellow eye differences in ln(Pdc ). p Values were estimated using two sided t tests

Mean difference95% CIp Value
Lens − no lens0.3410.063, 0.1690.02
Right − left−0.013−0.265, 0.2900.93
First − second−0.127−0.405, 0.1510.36