Table 3.
Comparison of hospital variables between Growth Velocity Quartiles (Q1, Q2, Q3, Q4).
| Q1 Median [IQR] | Q2 Median [IQR] | Q3 Median [IQR] | Q4 Median [IQR] | χ2 | DF | p-value | |
|---|---|---|---|---|---|---|---|
| Hospital length of stay (days) | 19.0 [5.0] | 23.0 [11.0] | 28.0 [16.0] | 32.0 [29.0] | 42.4 | 3 | <0.001 |
| Discharge gestational age (weeks) | 36.6 [1.9] | 36.6 [2.2] | 36.3 [1.6] | 37.4 [2.3] | 7.3 | 3 | 0.1 |
| Days with parenteral feeds | 5.0 [2.5] | 6.0 [2.5] | 6.0 [2.0] | 6.0 [3.5] | 8.7 | 3 | 0.03 |
| Age at start of enteral feeds (days) | 1.0 [1.0] | 1.0 [1.0] | 1.0 [2.0] | 1.0 [1.0] | 4.1 | 3 | 0.3 |
| Days of respiratory support | 1.0 [4.5] | 2.0 [5.0] | 2.0 [7.0] | 4.0 [15.5] | 6.6 | 3 | 0.1 |
| Days to reach 110 ml/kg/day of enteral feedsnQ3 = 51, nQ4 = 51) | 7.0 [2.0] | 8.0 [3.0] | 7.0 [2.5] | 7.0 [4.0] | 4.9 | 3 | 0.2 |
Q1, Q2, Q3, Q4 = 1st, 2nd, 3rd, 4th Growth Velocity Quartiles. nQ1, nQ2, nQ3, nQ4 = number of patients with 1st, 2nd, 3rd, 4th Growth Velocity Quartiles. DF = degrees of freedom. IQR = interquartile range. χ2: chi-square. Comparisons were performed using Kruskal—Wallis. Variables were selected based on clinical relevance. Sample size for each growth velocity quartiles was 51 unless otherwise stated.