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Table 4 Pre-existing medical conditions.

From: Analysis of preterm deliveries below 35 weeks' gestation in a tertiary referral hospital in the UK. A case-control survey

  Control (≥37 weeks'
gestation)
Preterm (<35 weeks'
gestation)
P value
Number of deliveries 553 228  
Anaemia 103 (18.6%) 45 (19.7%) 0.72
Respiratory problems 89 (16.1%) 39 (17.1%) 0.73
Depression/Psychiatric Disease 83 (15.0%) 50 (21.9%) 0.019
Hypertension 51 (9.2%) 34 (14.9%) 0.020
Renal Disease 34 (6.1%) 18 (7.9%) 0.37
Sexually transmitted diseases 33 (6.0%) 16 (7.0%) 0.58
Cardiac disease 24 (4.3%) 9 (3.9%) 0.80
Thyroid Disease 14 (2.5%) 3 (1.3%) 0.29
IVF 12 (2.2%) 6 (2.6%) 0.70
Diabetes 11 (2.0%) 3 (1.3%) 0.52
Hepatitis B 10 (1.8%) 5 (2.2%) 0.72
Bleeding disorders 8 (1.4%) 3 (1.3%) >0.99*
Uterine abnormalities 10 (1.8%) 14 (6.1%) 0.001
Cervical incompetence/cervical suture 0 5 (2.2%) 0.002*
  1. *Two-tailed Fisher's Exact test