The rate of morbidity increased with increasing disease severity.
Maternal morbidity increases with each caesarean section, which is attributable mostly to placenta accreta or the need for hysterectomy [ 21].
[ 2, 3] At the same time the population of Georgia was aging, and overall morbidity increased, with an increase in the prevalence of chronic conditions [ 4].
Obese children are also more likely to experience psychological or psychiatric problems than nonobese children, and the risk of psychological morbidity increases with age [ 3, 4].
It is well known that maternal and neonatal morbidity increases with birthweight and especially over 4500 g [ 5, 9, 11, 12, 22].
The correlation between rates of maternal and neonatal morbidity increases with the extent of in utero macrosomia (<4000 g, 4000 4499 g, ≥ 4500 g) [ 39].
Birth weight was divided into three categories: LBW (< 2,500 g), normal weight (2,500 g-4,500 g) and high birth weight (> 4,500 g), since morbidity increases with birth weight, and > 4,500 g may be a better predictor of neonatal morbidity.
Adding complexity to the association between TKR and SES is that whilst health literacy declines with age [ 36– 38], co-morbidities increase with age.
Studies comparing outcomes between younger patients and elderly patients show mortality and morbidity increase significantly with advancing age [ 3].
The prevalence of both chronic diseases and multi-morbidity increases with longer life spans.
