Figure 1.
Flow chart.
Table 1.
Baseline characteristics of pregnant women and neonates according to the number of prenatal care visits*.
Table 2.
Baseline characteristics of pregnant women and neonates according to the week of initiation of prenatal care.
Table 3.
The LBW risk estimation associated with the prenatal care and educational level.
Table 4.
The LBW risk analysis associated with the number of prenatal care visits stratified by the maternal educational attainment.#$.
Figure 2.
Adjusted odds ratio of LBW associated with the number of prenatal care visits.
Data were fitted using a logistic model with restricted cubic splines with 4 knots (5, 7, 9, and 11 times) of the distribution of the number of visits. Estimates were adjusted for the same variables as model a in Table 3. The log likelihood value of the model was −1838.0027, and R2 was 0.2908. The probability value for nonlinearity was 0.0002.