Skip to main content

Table 2 The baseline characteristics of the SGA by weight gain class

From: Insights into infancy weight gain patterns for term small-for-gestational-age babies

  Class 1
Excessively rapid catch-up growth
Class 2
Rapid catch-up growth
Class 3
Appropriate catch-up growth
Class 4
Slow catch-up growth
Class 5
Almost no catch growth
P for trend
Number of children [n (%)] 322(10.7) 593(19.7) 1673(55.6) 306(10.1) 110(3.6)
Gender [n (%)]
 Male 117(36.3) 201(33.8) 659(39.3) 145(47.3) 66(60.0) < 0.01
 Female 205(63.6) 392(66.1) 1014(60.6) 161(52.6) 44(40.0)
Gestational age (GA, wk.) 39.06(1.1) 39.13(1.0) 39.06(1.0) 38.70(1.1) 38.70(1.2) < 0.01
GA categories [n (%)]
 Late term (40 wk. ≤ GA<42 wk.) 102(31.6) 159(26.8) 490(29.2) 126(41.1) 52(47.2) < 0.01
 Early term (37 wk. ≤ GA<40 wk.) 220(68.3) 434(73.1) 1183 (70.7) 180(58.8) 58(52.7) < 0.01
Birthweight (BW, Kg) 2.57(0.1) 2.58(0.1) 2.55(0.1) 2.45(0.2) 2.37(0.2) < 0.01
BW (Z-score) −1.63(0.4) −1.60(0.4) −1.68(0.4) −1.96(0.6) −2.17(0.6) < 0.01
BW categories [n (%)]
 2.5Kg ≤ BW<3.0Kg 248 (77.0) 466(78.5) 1255(73.8) 165(53.9) 42(38.1) < 0.01
 BW<2.5Kg 74(22.9) 127(21.4) 438(26.1) 141(46.0) 68(61.8)
Residence [n (%)]
 Urban 65 (20.1) 100(16.8) 249 (14.8) 56 (18.3) 16(14.5) 0.12
 Rural 257(79.8) 493(83.1) 1424(85.1) 250(81.7) 94(85.4)
ΔWeight-for-age Z-score degrees between 4 mo and birth[n (%)] 2.81(0.6) 2.29(0.6) 1.62(0.5) 0.99(0.6) 0.71(0.6) < 0.01
 First (ΔWAZ <−0.67) 0(0.0) 0(0.0) 1(0.0) 2(0.65) 1(0.91)  
 Second (−0.67 < ΔWAZ< 0.67) 0(0.0) 4(0.6) 75(4.4) 99(32.35) 52(47.27)
 Third(0.67 < ΔWAZ<1.28) 6(1.8) 27(4.5) 403(24.0) 116(37.91) 40(36.36)
 Fourth (ΔWAZ> 1.28) 316(98.1) 56(94.7) 1194(71.3) 89(29.08) 17(15.45)
  1. Chi-square (categorical variables) or ANOVA (continuous variables) for linear trend, including all children (n = 3004); Data are expressed as mean ± SDS or No. (%).The Z-scores were calculated relative to age- and gender-specific WHO children growth standards. Continuous variables (gestational age, birthweight, BW (Z-score)) are shown in mean (SD)