Some bio-social factors for drop out of children undergoing oral polio vaccination

This study was designed to identify biosocial factors that contribute to India's high dropout rate for completion of the oral polio vaccine series. The study sample included the 2027 children registered in 1983-84 at an immunization clinic in Agra. At the time of the 1st dose, parents were educated about the importance of completing the series. 683 of the children were not returned for the 3rd dose, for a dropout rate of 33.7%. The majority of dropouts (42.6%) were clustered in the 3-6 month age group. There was a higher but nonsignificant dropout rate in females (35.4%) than in males (32.6%). The dropout rate was lowest among children of birth order 1 (23.2%) and highest in birth order 5 (72.1%). There was a statistically significant association between dropout rates and maternal occupational status; only 3.8% of children whose mothers were engaged in service occupations failed to complete the immunization series compared with 34.6% of those whose mothers were housewives. In addition, there was a significant association with paternal occupation. The maximum number of dropouts was noted among children whose fathers were laborers (51.2%) and the lowest rate was found among children of men in service occupations (23.6%). Finally, there was a significant inverse relationship between parental education and dropout rates. This relationship was most pronounced for maternal educational status. The dropout rate was only 5% in children whose mothers were educated at the high school level and above compared with 14% in children whose father's education was at this level.