Infant mortality in a cohort of 733 live born children in Lungwena
| Girls | Boys | Both sexes | |
| Singletons | 118 (41/346) | 138 (49/356) | 128 (90/702) |
| Twins | 286 (4/14) | 353 (6/17) | 323 (10/31) |
| All children | 125 (45/360) | 147 (55/373) | 136 (100/733) |
Infant mortality is the number of infant deaths/1000 live born children. The absolute numbers of observed deaths/number of evaluable children are in parentheses.