Table 2

Low birthweight recurrence [LBWR]* according to parity, maternal reproductive past history, maternal behaviors, and prenatal care in the index pregnancy
Variable N [%] LBWR [%] p
Parity [previous births] [n = 565] <0.001 a
 1 322 [57.0] 37 [11.5]
 2 117 [20.7] 21 [17.9]
 ≥3 126 [22.3] 28 [22.2]
Smoking in the 3rdtrimester [n = 565]
 No 382 [67.6] 47 [12.3] <0.001 b
 Yes 183 [32.4] 39 [21.3]
Coffee consumption in the 3rdtrimester [n = 565] 0.53 b
 No 181 [32.0] 30 [16.6]
 Yes 384 [68.0] 56 [14.6]
Abortion history [n = 565] 0.3 b
 No 437 [77.3] 63 [14.4]
 Yes 128 [22.7] 23 [18.0]
Interpartum interval [n = 544]c 0.28 b
 < 24 months 117 [21.5] 21 [17.9]
 ≥ 24 months 427 [78.5] 60 [14.0]
Preterm birth in previous pregnancy [n = 532]c <0.001 b
 No 345 [64.8] 28 [8.1]
 Yes 187 [35.2] 54 [28.9]
Prenatal care [n = 565] <0.001 b
 Adequate 320 [56.6] 33 [10.3]
 Intermediate or Inadequate 245 [43.4] 53 [21.6]

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

Sclowitz et al.

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

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