Table 4

Effect of theophylline administration on respiratory function in 16 infants

	Before	After 12 h	Mean difference before-after12 h	After 48 h	Mean difference before-after48 h
C_rs (ml/kPa/kgPa)	16.6	18.3^4-150	1.73 (0.28)	18.8^4-150	2.23 (0.62)
R_rs(kPa/l/s)	7.1	6.8^4-151	−0.31 (0.09)	6.7^4-151	−0.43 (0.13)
TC (s)	0.23	0.26^4-151	0.02 (0.01)	0.24^4-151	0.02 (0.01)
TV (m//kg)	7.5	8.1^4-151	0.58 (0.28)	8.6^4-151	1.11 (0.36)

Data are expressed as mean (SEM).
↵4-150 p < 0.05,
↵4-151 p > 0.05 compared with value before theophylline treatment.
C_rs, Respiratory system compliance; R_rs, respiratory system resistance; TC, expiratory time constant; TV, tidal volume.