Table 4 Results of bivariate correlation analysis to show relationship between growth at 36 weeks' PMA, quantitative magnetic resonance imaging at 40 weeks' PMA and developmental outcome in the first year

	MDI (n = 86)		PDI (n = 86)
	3 months R (p value)	9 months R (p value)	3 months R (p value)	9 months R (p value)
OFC SDS	0.27 (0.01)	0.26 (0.03)	0.31 (0.006)	0.29 (0.02)
Length SDS	0.38 (0.007)	0.33 (0.02)	0.49 (<0.001)	0.28 (0.06)
Weight SDS	0.3 (0.006)	0.34 (0.004)	0.37 (0.001)	0.36 (0.002)
TBV	0.33 (0.03)	0.48 (0.002)	0.54 (<0.001)	0.38 (0.17)
CBV	0.31 (0.06)	0.33 (0.05)	0.36 (0.02)	0.24 (0.16)
T2 time	−0.34 (0.02)	−0.51 (<0.001)	−0.41 (0.003)	−0.31 (0.034)

CBV, cortical brain volume; MDI, mental developmental index; OFC, occipitofrontal circumference; PDI, psychomotor developmental index; PMA, postmenstrual age; R, correlation coefficient; SDS, standard deviation scores; TBV, total brain volume.