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Table 2 Maternal and neonatal characteristics by LRTI incidence

From: The effect of exposure to particulate matter during pregnancy on lower respiratory tract infection hospitalizations during first year of life

  Jewish origin Arab-Bedouin origin
Without LRTI (n = 22,724) LRTI (n = 530) p-value Without LRTI (n = 32,736) LRTI (n = 1341) p-value
Demographic characteristics
 Age, years       
  Mean ± SD, (n) 30 ± 5 (22,724) 29 ± 5 (530) 0.203 27 ± 6 (32,736) 28 ± 6 (1341) 0.04
  Median 29 29   27 27  
 Low tertile of socioeconomic status, % (n) 2.3 (485) 2.8 (14) 0.02 66.4 (21,762) 69.3 (930) 0.05
Medical and obstetrics history
 Gestational Diabetes Mellitus, % (n) 4.7 (1058) 4.7 (25) 0.94 2.6 (859) 3.9 (52) 0.005
 Primiparous, % (n) 32.1 (7290) 17.6 (93) < 0.001 19.6 (6419) 11.6 (155) < 0.001
Neonatal data
 Gestational age (weeks),       
  Mean ± SD, (n) 38.8 ± 2 (22,724) 38.2 ± 2 (530) < 0.001 39.1 ± 2 (32,736) 38.5 ± 2 (1341) < 0.001
  Median 39 38.8   39.2 39  
 Preterm delivery, % (n) 9.5 (2159) 16.8 (89) < 0.001 9.2 (3025) 16.7 (224) < 0.001
 Male gender, % (n) 50.7 (11,527) 56.6 (300) 0.007 51 (16,698) 54.4 (729) 0.01
 Birth weight, gram       
  Mean ± SD, (n) 3154 ± 539 (22,724) 3062 ± 611 (530) < 0.001 3151 ± 537 (32,736) 3045 ± 625 (1341) < 0.001
  Median 3180 3105   3180 3110  
 Small for Gestational Age (SGA), % (n) 3.3 (756) 2.8 (18) 0.90 4.4 (1440) 4.5 (60) 0.92
 Large for Gestational Age (LGA), % (n) 6.7 (1501) 5.8 (30) 0.406 6.8 (2191) 6.9 (92) 0.84
 Apgar score
  1st minute < 5, % (n) 5.3 (1185) 6.3 (33) 0.312 6.9 (2234) 10.2 (134) < 0.001
  5th minute < 7, % (n) 0.6 (144) 0.9 (5) 0.256 0.9 (304) 2.2 (29) < 0.001