Table 3. Comparison of mental development index and psychomotor developmental scores at 20 months’ corrected age (n=32) between sexes.

Index	Female	Male	p value
MDI	100.0 [98.0-115.5]	97.0 [91.8-104.0]	0.036*
PDI	99.6 (10.8)	96.4 (6.5)	0.299†

Results expressed as median [interquartile range] or mean (stadard deviation).

^*Mann-Whitney U test;

^†Student's t test.

MDI: mental development index; PDI: psychomotor developmental index.