. 2021 Dec 2;16(12):e0260138. doi: 10.1371/journal.pone.0260138

Table 2. Comparison between Bayley percentile rank and percentile of the Egyptian studied sample.

	Group	Mean	SD	t-test	p
Cognitive percentile rank	Bayley percentile rank	35.6281	27.30338	-4.173	<0.001^*
Cognitive percentile rank	Egyptian percentile rank	46.6388	29.42271	-4.173	<0.001^*
Language percentile rank	Bayley percentile rank	34.4500	25.24403	-5.612	<0.001^*
Language percentile rank	Egyptian percentile rank	48.6562	28.48024	-5.612	<0.001^*
Motor percentile rank	Bayley percentile rank	41.1384	31.29743	-2.665	0.008^*
Motor percentile rank	Egyptian percentile rank	48.6562	28.48024	-2.665	0.008^*

*p < 0.05.