Table 1

Mean maximal flow at functional residual capacity (V’maxFrc) and percentage of total sodium cromoglicate excreted in the urine (% total SC) for infants with normal birth histories and those with chronic lung disease of prematurity

Group	V’maxFrc (ml/s)	% Total SC
Normal
	150	0.6
	94.7	0.3
	205	0.47
	85	0.37
	82.5	0.05
	250	0.08
	173	0.13
Mean	148.60	0.28
SE	24.5	0.07

Chronic lung disease of prematurity
	50	0.03
	56.4	0.28
	10.2	0.07
	32	0.16
	25	0.6
	57	0.27
	80	0.2
	8.8	0.65
Mean	39.92	0.28
SE	8.8	0.08

A significant difference was found between V’max Frc in the normal and chronic lung disease groups (p < 0.001). No significant difference was found for % total SC (p = 0.977).