Table 2 Predicted probability and observed proportion of SGA infants according to the quintiles of each risk score. The risk score during early gestation comprised the maternal age, height, BMI during early gestation, parity, ART with FET, smoking status, BP during early gestation, and maternal birth weight. The risk score during mid-gestation (model 1) consisted of the maternal age, height, BMI during mid-gestation, weight gain, parity, ART with FET, smoking status, BP level during mid-gestation, and maternal birth weight. The risk score during mid-gestation (model 2) also consisted of the maternal age, height, BMI during mid-gestation, weight gain, parity, ART with FET, smoking status, BP level during mid-gestation, maternal birth weight, and estimated fetal weight during mid-gestation.
From: Risk scores for predicting small for gestational age infants in Japan: The TMM birthree cohort study
Total risk score | Predicted probability of SGA infants (95% CI), % | Observed proportion of SGA infants (Cases/total), % |
|---|---|---|
Early gestation | ||
Quintile 1 (≤ -2) | 2.6 (2.1–3.2) | 2.7 (87/3,262) |
Quintile 2 (-1 to 0) | 4.3 (3.6–5.0) | 4.3 (137/3,222) |
Quintile 3 (1 to 2) | 5.8 (4.9–6.4) | 5.7 (208/3,679) |
Quintile 4 (3 to 4) | 7.5 (6.6–8.4) | 7.5 (242/3,217) |
Quintile 5 (≥ 5, High risk) | 12.1 (11.2–13.3) | 12.2 (452/3,693) |
Predicted probability of SGA infants based on the risk score | exp(logit)/(1 + exp[logit]) where logit = -3.0394 + 0.1545 × (risk score) | – |
Model 1 during mid-gestation | ||
Quintile 1 (≤ -3) | 2.4 (1.9–2.9) | 2.4 (92/3,808) |
Quintile 2 (-2 to -1) | 4.1 (3.4–4.8) | 4.1 (116/2,831) |
Quintile 3 (0 to 1) | 5.5 (4.9–6.4) | 5.6 (200/3,564) |
Quintile 4 (2 to 3) | 7.6 (6.2–8.0) | 7.1 (215/3,023) |
Quintile 5 (≥ 4, High risk) | 12.9 (12.0–14.1) | 13.1 (503/3,847) |
Predicted probability of SGA infants based on the risk score | exp(logit)/(1 + exp[logit]) where logit = -2.9199 + 0.1671 × (risk score) | – |
Model 2 during mid-gestation (Model 1 + EFW) | ||
Quintile 1 (≤ -5) | 1.7 (1.1–1.9) | 1.5 (51/3,199) |
Quintile 2 (-4 to -2) | 3.4 (3.0–4.1) | 3.6 (146/4,099) |
Quintile 3 (-1 to 0) | 5.1 (4.2–5.8) | 5.0 (151/3,017) |
Quintile 4 (1 to 3) | 7.8 (7.4–9.2) | 8.3 (292/3,538) |
Quintile 5 (≥ 4, High risk) | 16.5 (14.7–17.4) | 16.1 (486/3,028) |
Predicted probability of SGA infants based on the risk score | exp(logit)/(1 + exp[logit]) where logit = -2.8282 + 0.1853 × (risk score) | – |
