1) Persons with disabilities refers to persons formally recognised as disabled, with a degree of dissability of 33% or over, according to the procedure for evaluating this established in the RD 1971/1999 and modified by the RD 1856/2009.

2) Wage ratio between two categories is defined as the ratio, expressed in percentages, between the earnings corresponding to the first category and the earnings corresponding to the second category. When the ratio equals 100, there is a situation of equal pay in both categories. The greater the deviation from 100, the greater inequality between the salaries of those categories. The earnings are greater in the first category when the value is over 100, and they are greater in the second category if the ratio value is under 100.

3) When the box is marked with a '-' sign before the data, it indicates that the number of sample observations is between 100 and 500, so the figure is subject to great variability.