Table 3

Low birthweight recurrence [LBWR]* according to pregnancy morbidities, preterm labor, gestational weight gain, and newborns’ sex
Variable N [%] LBWR [%] p
Arterial hypertension [n = 562]a 0.74 b
 No 410 [72.9] 64 [15.6]
 Yes 152 [27.1] 22 [14.5]
Anemia [n = 555]a 0.02 b
 No 179 [32.5] 36 [20.1]
 Yes 376 [67.7] 48 [12.8]
Miscarriage threat [n = 564]a 0.96 b
 No 491 [87.1] 75 [15.3]
 Yes 73 [12.9] 11 [15.1]
Preterm labor [n = 565] 0.01 b
 No 422 [74.7] 55 [13.0]
 Yes 143 [25.3] 31 [21.7]
Last trimester vaginal bleeding [n = 565] 0.82 b
 No 516 [91.3] 78 [15.1]
 Yes 49 [8.7] 8 [16.3]
Urinary tract infection [n = 561]a 0.01b
 No 332 [59.2] 40 [12.0]
 Yes 229 [40.8] 45 [19.6]
Gestational weight gain [n = 403]a <0.001c
 < 7 kg 236 [49.6] 60 [25.4]
 7 – 9.9 kg 99 [20.8] 12 [12.1]
 ≥ 10 kg 141 [29.6] 3 [2.1]
Newborn’s sex [n = 563]a 0.001b
 Male 286 [50.8] 29 [10.1]
 Female 277 [49.2] 56 [22.2]

* LBWR defined as birth weight < 2,500 g in the index pregnancy (pregnancy that ended in 2004) amongst women with at least one previous LBW newborn in the two immediate pregnancies before the pregnancy that ended in 2004.

a: indicates missing values; b: chi squared test for heterogeneity; c: linear trend.

Sclowitz et al.

Sclowitz et al. BMC Pregnancy and Childbirth 2013 13:20   doi:10.1186/1471-2393-13-20

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