Likewise, having a first born child with cerebral palsy reduced a mother's probability of having a second child by 23%.
Lastly, the results may be a reflection of a cohort effect – children with siblings have older mothers and the probability of taking children to vaccination decreases over time.
Adjusting for the risk factors in the final model, infants born to HIV-positive mothers had higher probability of severe growth restriction than those of HIV-negative mothers, although this did just not reach statistical significance due to lack of statistical power (aRR: 1.33, 95% CI: 0.98 1.79; P = 0.067).
Having an image of thinness of their parents also decreased the possibility of a negative perception (underweight father, OR = 0.54; underweight mother, OR = 0.47), while the image of having an obese mother made this probability to increase (OR = 1.21, p = 0.67).
For mother, I, with probability Pi the only possible response of the first process is zero counts, and with the probability of (1 − Pi) the response of the second process is governed by a negative binomial with mean λi.
Similar to Adedokun et al. [3] and Antai [5], the results indicate a positive relationship between the age at birth of the mother and the probability of the child being fully immunized in 2008 and 2014.
Therefore, for every one unit increase in X (a set of predictor variables) there is a corresponding effect on the probability mother or child getting PMTCT service.
Our study finding showed that when the health facility was nearer to the place where the mother lives, the probability of getting PMTCT services increase dramatically.
Based on the relationship between the age of the mother and the probability of being pregnant with a child with trisomy 21 (Down Syndrome), we divided age into three groups (≤30, 31 35, ≥ 36) [ 27].
