Table 2 Comparison of treatment information and complications between the response group and non-response group
Variables | Total (n = 221) | Non-response group (n = 61) | Response group (n = 160) | Z/X2 | P |
|---|---|---|---|---|---|
No oxygen therapy at admission, n (%) | 29 (13.1) | 9 (14.8) | 20 (12.5) | 0.197 | 0.657 |
Noninvasive mechanical ventilation at admission, n (%) | 157 (71.0) | 39 (63.9) | 118 (73.8) | 2.068 | 0.150 |
Invasive mechanical ventilation at admission n (%) | 35 (15.8) | 13 (21.3) | 22 (13.8) | 1.894 | 0.169 |
Total oxygen supplementation time, M (Q1, Q3), days | 19.0 (10.6, 38.6) | 39.5 (22.6, 52.8) | 16.0 (8.9, 28.3) | -6.273 | < 0.001 |
Noninvasive mechanical ventilation time, M (Q1, Q3), days | 13.4 (6.4, 29.4) | 30.3 (11.4, 44.5) | 10.2 (5.1, 19.2) | -5.539 | < 0.001 |
Invasive mechanical ventilation, n (%) | 40 (18.1) | 18 (11.3) | 22 (36.1) | 18.346 | < 0.001 |
Invasive mechanical ventilation time, M (Q1, Q3), days | 2.9 (1.5, 5.7) | 3.5 (2.1, 7.6) | 2.5 (0.9, 4.2) | -2.066 | 0.039 |
High-frequency ventilation mechanical time, M (Q1, Q3), days | 1.8 (0.5, 4.0) | 1.7 (0.7, 5.1) | 2.0 (0.1, 3.6) | -1.043 | 0.297 |
Re-intubations after extubation, n (%) | 5 (2.3) | 4 (6.6) | 1 (0.6) | 4.602 | 0.032a |
Caffeine citrate average Maintenance dose, M (Q1, Q3), mg/kg/d | 5.1 (5.0, 5.5) | 5.7 (5.0, 9.8) | 5.0b | -9.447 | < 0.001 |
Caffeine citrate duration, M (Q1, Q3), days | 15.5 (9.0, 28.0) | 30.5 (17.0, 43.0) | 12.5 (8, 21) | -6.147 | < 0.001 |
BPD, n (%) | 79 (35.7) | 44 (72.1) | 35 (21.9) | 48.563 | < 0.001 |
Mild BPD, n (%) | 35 (15.8) | 22 (36.1) | 13 (8.13) | 21.146 | < 0.001 |
Moderate and severe BPD, n (%) | 44 (19.9) | 22 (36.1) | 22 (13.8) | 13.792 | < 0.001 |
NEC, n (%) | 5 (2.3) | 1 (1.6) | 4 (2.5) | 0.000 | 1.000a |
ROP, n (%) | 91 (41.2) | 40 (65.6) | 51 (31.9) | 20.705 | < 0.001 |
Brain injury, n (%) | 33 (14.9) | 14 (23.0) | 19 (11.9) | 4.265 | 0.039 |
Death, n (%) | 1 (0.5) | 1 (1.6) | 0 | 0.252 | 0.616a |
Length of hospital stay, M (Q1, Q3), days | 30.0 (21.0, 47.0) | 50.5 (33.8, 65.0) | 27 (20, 35) | -5.981 | < 0.001 |