Generate weighted (NCS-R Part 1 sampling weight = NCSRWTSH) Kaplan–Meier estimates of the…

Generate weighted (NCS-R Part 1 sampling weight = NCSRWTSH) Kaplan–Meier estimates of the survival curves for the four age groups defined by the categorical age variable AG4CAT (1 = age 18–29, 2 = 30–44, 3 = 45–59, 4 = 60+). What do the survival curves suggest about the hazards of initial GAD diagnosis as a function of age for these four age cohorts?