RT Journal Article SR Electronic T1 Population morbidity screening--practical methodology for small populations. JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 643 OP 648 DO 10.1136/adc.59.7.643 VO 59 IS 7 A1 N Bankole A1 J S Fry YR 1984 UL http://adc.bmj.com/content/59/7/643.abstract AB During a study of the health status of children in rural Nigerian communities a gross lack of fit was observed between the sample and the growth attainment standards derived from local longitudinal data. The degree of misfit was greater in children over the age of 3 years and deteriorated with age thereafter. A very high incidence of tuberculosis seemed to be responsible for the deviation in the sample. A simple practical methodology is presented, suitable for dealing with small samples: this is an application of the established Z value analysis which may easily be used by a wide variety of personnel.