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Table 3 Content and procedures of antenatal care by group

From: Adequacy of antenatal care and its relationship with low birth weight in Botucatu, São Paulo, Brazil: a case-control study

ANC procedures Case group Control group p
  (<2500 g) (≥2500 g)
  Mean SD Range Mean SD Range
Number of ANC visits 16.9 6.9 2–41 18 6.9 4 - 44 0.001
Number of gestational weeks at the first ANC visit1 13.5 6.2 4 - 36.4 13.6 8.2 1.6-33.6 0.810
Number of ANC visits N = 511 % N=538 % p
Adequate 351 68.7 433 80.5 < 0.001
Initiation of ANC¹ ≤ 17 weeks > 17weeks ≤ 17 weeks ≤ 17 weeks p
N % N % N % N % 0.85
370 77.1 110 22.9 399 76.4 123 23.6
Laboratory studies and exams N= 511² % N= 538² % p
Adequate 272 94.4 281 98.6 0.007
  1. Source: Records of pregnant women in Primary Health Care Units and Clinics Hospital.
  2. 1No information Case group 31 (6.1%); Control group 16 (2.9%).
  3. 2No Information Case group 223 (43.6%); Control group 253 (47.0%).