Baseline characteristics
The mean age of all included subjects was 26.6±3.7 years. 223 (4.3%)
were PTB; 126 (2.3%) gave birth
to LBW infants; The incidence of SGA
was 316 (5.8%). Women who delivered PTB infants or LBW infants had
higher prevalence of HDP (P <0.05); Compared with
full-term women, women who gave PTB have a lower proportion of rural
residents (P <0.05); Mothers who gave birth to
LBW babies had a higher
proportion of non-births than mothers who gave birth to NBW babies
(P <0.05); The proportion of mothers who delivered SGA,
young in age, annual household income ≤49,999, pre-pregnancy weight,
insufficient weight gain during pregnancy and non-birth was higher, and
the incidence of gestational diabetes was lower
(P <0.05), as detailed in Table 1.