<prompt> Which of the following is not an indicator for disability?HALEDALYPearl indexSullivans index  <response>: Pearl index is a measure of effectiveness of a contraceptive method. It is expressed as failure rate per 100 woman years and is not related to disability. Note: HALE - Health Adjusted Life Expectancy DALY - Disability Adjusted Life Years Ref: Parks Textbook of Preventive Medicine, 17th Edition, Pages 22, 351. 