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Table 2 The differences in cardio-respiratory symptoms before and during car seat testing in association with symptoms in supine position, gestational age and pre-discharge weight (n, %).

From: Risk of cardio-respiratory abnormalities in preterm infants placed in car seats: a cross-sectional study

Cardio-respiratory symptom Car seat testing Symptoms while supine Gestational age (weeks) Pre-discharge weight (grams)
   Symptoms (+) (n = 15) Symptoms(-) (n = 27) <28 (n = 16) 28–34 (n = 26) < = 2,000 (n = 24) >2,000 (n = 18)
Periodic Breathing before 9 (60.0%) 0 7 (43.8%) 2 (7.7%) † 5 (20.8%) 4 (22.2%)
  during 9 (60.0%) 16 (59.3%) 9 (56.3%) 16 (61.5%) 16 (66.7%) 9 (50.0%)
Bradycardia (HR ≤80/min) before 4 (26.7%) 0 2 (12.5%) 2 (7.7%) 3 (12.5%) 1 (5.6%)
  during 5 (33.3%) 9 (3.3%) 5 (31.3%) 9 (34.6%) 9 (37.5%) 5 (27.8%)
O2 Saturation <90% before 9 (60.0%) 0 5 (31.3%) 4 (15.4%) † 8 (33.3%) 1 (5.6%) †
  during 13 (85.2%) 20 (74.1%) 12 (75.0%) 21 (80.8%) 20 (83.3%) 13 (72.2%)
Combination * before 10 (66.7%) 0 6 (37.5%) 4 (15.4%) † 9 (37.5%) 1 (5.5%) †
  during 12 (80.0%) 23 (85.2%) 14 (87.5%) 21 (80.8%) 22 (91.7%) 13 (72.2%) ††
  1. *Presence of any cardio-respiratory symptoms
  2. † (P < 0.05) differences in frequency of cardio-respiratory symptoms in supine position in association with gestational age and pre-discharge weight.
  3. †† (P < 0.05) differences in frequency of cardio-respiratory symptoms during car seat testing in association with symptoms in supine position, gestational age, and pre-discharge weight.