Lung Function and Relevant Clinical Factors in Very Low Birth Weight Preterm Infants with Chronic Lung Disease: An Observational Study
Table 2
Comparison of pulmonary function parameters between groups.
CLD (n = 27)
No CLD (n = 18)
value
Postnatal age on checking lung function (days old)
93.30 ± 20.14
55.39 ± 20.16
<0.001
PMA on checking lung function (weeks)
41.33 ± 2.21
37.86 ± 2.42
<0.001
Body weight on checking lung function (kg)
2.73 ± 0.54
2.47 ± 0.61
0.010
Body length on checking lung function (cm)
47.06 ± 3.73
45.39 ± 4.00
0.121
z-score of body weight
−2.39 ± 1.25
−1.50 ± 1.25
0.018
z-score of body length
−2.40 ± 1.69
−1.48 ± 1.58
0.161
FRC (ml)
59.84 ± 22.54
56.24 ± 12.68
0.900
FRC (ml/kg)
19.29 ± 12.16
19.59 ± 11.21
0.757
FRC (ml/cm)
1.28 ± 0.47
1.24 ± 0.24
0.828
TV (ml)
23.68 ± 5.53
23.70 ± 3.91
0.828
TV (ml/kg)
8.86 ± 2.33
9.81 ± 1.40
0.050
MV (ml/kg)
1334.83 ± 682.92
1067.36 ± 529.21
0.285
RR (min)
78.31 ± 19.35
78.08 ± 16.07
0.959
TI (s)
0.38 ± 0.09
0.39 ± 0.09
0.667
TE (s)
0.44 ± 0.16
0.43 ± 0.10
0.823
TI/Ttot
0.63 ± 0.19
0.60 ± 0.20
0.361
TPTEF (s)
0.18 ± 0.13
0.19 ± 0.06
0.081
TPTEF/TE (%)
42.16 ± 18.21
47.12 ± 15.93
0.285
LCI
15.39 ± 4.28
15.97 ± 3.68
0.761
M1/M0
4.56 ± 1.26
5.44 ± 2.68
0.455
M2/M0
39.75 ± 21.05
43.95 ± 32.18
0.900
All continuous data are presented as mean ± SD. FRC: functional residual capacity; TV: tidal volume; TI: inspiratory time; TE: expiratory time; TPTEF: time to peak tidal expiratory flow; TPTEF/TE: the ratio of time to peak tidal expiratory flow over total expiratory time; M1/M0 and M2/M0: first and second moment ratios.
