. 2024 Mar 29;103(13):e37542. doi: 10.1097/MD.0000000000037542

Table 3.

Neonatal outcomes.

	Group 1 (≤1year)	Group 2 (1 < group < 6 year)	Group 3 (≥6 years)	P value
PBR, n (%)	2282 (16.19)^a	378 (18.57)^b	14 (19.72)^a,b	.02
Sex ratio, n (%)
Male	7827 (55.51)^a	1104 (54.22)^a	38 (53.52)^a	.52
Female	6272 (44.49)^a	932 (45.78)^a	33 (46.48)^a	.52
BW, mean(SD), g	3251.18 ± 511.81^a	3238.66 ± 529.43^a	3296.76 ± 515.29^a	.45
GW, mean(SD), wk	36.09 ± 1.85^a	35.86 ± 1.92^b	35.71 ± 1.38^a,b	<.001

One-way ANOVA was used for continuous variables conforming to a normal distribution, expressed as mean ± standard deviation. The Bonferroni method facilitated pair-by-pair comparisons between groups. For categorical variables, the number of cases (expressed as a percentage) underwent between group comparisons using chi-square tests, and chi-square splitting was utilized for 2-by-component comparisons. The results of pair-by-pair comparisons between groups after P value adjustment are denoted as “a” and “b.” The abbreviations used are as follows: BW = Birth weight, GW = Gestational week, PBR = Preterm birth rate.