Data were obtained from the Multiple Indicator Cluster Survey, which was conducted by the National Statistical Office of Thailand from December 2005 to February 2006. The survey used structured, face-to-face interviews with women of reproductive age (15-49 years) in all provinces, and anthropometric measurement of children less than 5 years of age. An original sample of 43 440 nationally representative households was selected using a two-stage, stratified sampling technique. In this sample, 40 511 (or 93.3%) responded to the survey.