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Table 3 Obstetric factors associated with delivery of low birth weight babies, WAU, 2020

From: Determinants of low birth weight deliveries at five referral hospitals in Western Area Urban district, Sierra Leone

Characteristics Cases (n = 146) Controls (n = 292) Crude OR (95% CI) p-value
Mother’s weight (kg)
  < 50 4 (2.7) 9 (3.1) 0.88 (0.19–3.24) 0.842
  ≥ 50 142 (97.3) 283 (96.9) 1  
Mother’s height (m)
  < 1.5 (short) 47 (32.2) 52 (17.8) 2.19 (1.34–3.55) 0.001*
  ≥ 1.5 (normal) 99 (67.8) 240 (82.2) 1  
Mother’s BMI (kg/m2)
  < 18.5 (underweight) 4 (2.7) 9 (3.1) 1.26 (0.35–4.45) 0.715
 18.5–24.9 (normal) 35 (23.9) 48 (16.4) 2.07 (1.11–3.87 0.022
 25–29.9 (overweight) 81 (55.5) 161 (55.1) 1.43 (0.85–2.40) 0.176
  ≥ 30 (obese) 26 (17.8) 74 (25.3) 1  
Parity
 Primiparous 83 (56.8) 148 (50.7) 1.28 (0.84–1.95) 0.223
 Multiparous 63 (43.2) 144 (49.3) 1  
Gravidity
 Primigravida 80 (54.8) 117 (40.1) 1.81 (1.18–2.76) 0.003*
 Multigravida 66 (45.2) 175 (59.9) 1  
ANC Visits
  < 4 times 60 (41.1) 60 (20.5) 2.69 (1.70–4.26) <  0.001*
  ≥ 4 times 86 (58.9) 232 (79.5) 1  
Gestational age (weeks)
 Preterm (< 37) 134 (91.8) 213 (72.9) 12.58 (1.66–94.84) 0.014*
 Term (37–40) 11 (7.5) 59 (20.2) 3.72 (0.45–30.72) 0.221
 Post term (> 40) 1 (0.7) 20 (6.9) 1  
Anaemia during pregnancy
 Anaemic (Hb < 11.0 g/dl) 82 (56.2) 64 (21.9) 4.56 (2.90–7.16) <  0.001*
 Not anaemic (Hb ≥ 11.0 g/dl) 64 (43.8) 228 (78.1) 1  
Birth spacing
  < 2 years 24 (29.3) 29 (15.4) 2.26 (1.15–4.39) 0.008*
  ≥ 2 years 58 (70.7) 159 (84.6) 1  
Previous abortion
 Ever had 42 (28.8) 73 (25.0) 1.21 (0.75–1.93) 0.398
 Never had 104 (71.2) 219 (75.0) 1  
  1. 1 = Reference group; *p-value < 0.05 is statistically significant