No association was found between parity and mortality in women with low or high education, in women with normal weight (body mass index < 25) or in overweight and obese women (body mass index ≥ 25).
The finding in this study of an association between overweight and parity concords with the results of an investigation carried out in 508 Chilean women, which found a positive relationship between parity and BMI, leading to a body-weight increase of 0.46 kg for each child born [ 22].
The risk ratios for the interaction between parity and RPC decreased within parity.
Research has shown associations between parity and several diseases.
No association was observed between parity and ovarian steroids.
There was an interaction between parity and season.
There was no effect of parity on the effect of treatment (interaction tem between parity and treatment P=0.67).
There were no relationships between parity and total mortality (P-value for overall effect of parity = 0.32).
However, there were no significant effects of parity, or the interaction between parity and litter size, on piglet weight on day 1 (GLM, parity, F3,32 = 0.9, p = 0.45, interaction between litter size and parity, F3,32 = 0.8, p = 0.49) or on weight gain (GLM, parity, F3,32 = 0.6, p = 0.60, interaction between litter size and parity, F3,32 = 1.4, p = 0.27).
In addition, interactions between parity and surgery treatment for POP and between parity and BMI were entered to the same multivariate analysis.
