For each question, we asked who carried out the activity and during what time period, specified as 1 year before pregnancy, during pregnancy, and from birth to the reference date.
Parity was studied using categories of first birth, 2nd-3rd birth and 4 or more births, with first birth as the reference group.
Parity was categorised with first birth as the reference, second and third birth as two separate categories, and fourth and subsequent births constituting the fourth category.
The method employed in the current study to compute mortality rates used person-years as a reference and differs from the method used in DHS reports in Tanzania using live births as the reference category.
Seven of the nine, including birth hospital, had one or more subcategories that differed from the reference group (95% Confidence Interval excluded 1.0) with all variables entered.
Since no information was available on these children, including birth dates, we were not able to exclude these children from the reference population.
Thus, only copies of birth notices of female neonates were reviewed to ascertain that both parents were from the reference tribe.
An efficient solution consists in coding the partials of each source signal (computed from the reference sinusoidal parameters) as a triplet ( k ∘, α, β ) where k ∘ corresponds to the first discrete frequency index corresponding to the birth of the partial.
From the reference population a representative sample of 550 dogs were selected for by random sampling stratified by year of birth.
Each patient was matched (according to year of birth) to 3 controls in the reference group (N = 18,416), except for 4 patients, who could only be matched to 2 controls from the reference group.
