What i have understood about the Initial and central exposed to risk ia as below. with the expression for Ex initial exp. risk ( page 8 Ch10) and referring the waiting time defination from ch4... Example. 10 male age 40 having same date of birth entering in to observation for 1 year on next day after celebrating 40th birthday. So 1) initial exposed is 10 years. now suppose 4 died exactly after 6 months. 2) central exposed is 8 years. What tutor says on this?
