Table 1

Demographics of the symptomatic and control groups

Symptomatic group
n=39
Control group
n=59
Total
n=98
P value
Sex
 Male19 (49%)37 (63%)56 (60%)0.171
 Female20 (51%)22 (37%)42 (40%)
Age group (age at the time of survey)0.894
 1–3 years12 (31%)19 (32%)31 (32%)
 5–7 years17 (43%)23 (39%)40 (41%)
 13–15 years10 (26%)17 (29%)27 (27%)
Birth information
 Preterm birth (< 37 weeks)2 (5%)4 (7%)6 (6%)0.739
 Birth weight (g), mean (SD)*3210 (582)3320 (735)3270 (674)0.426
 Birth height (cm), mean (SD)†49 (2.1)49 (3.2)49 (2.8)0.401
 Gestational age-adjusted SD score, mean (SD)‡−0.77 (1.2)−0.58 (1.4)−0.66 (1.4)0.532
 Twin pregnancy1 (3%)4 (7%)5 (5%)0.353
Time of operation0.326
 < 1 months of age22 (56%)29 (49%)51 (52%)
 1–12 months of age12 (31%)26 (44%)38 (39%)
 > 12 months of age5 (13%)4 (7%)9 (9%)
Age (days) at time of surgery, median (IQR)17 (5.5, 149.5)50 (7, 141.5)19.5 (6, 143.8)0.655
Urgency
 Urgent10 (25%)12 (20%)22 (22%)0.538
 Elective29 (75%)47 (80%)76 (78%)
Thymectomy§
 Partial30 (77%)48 (81%)78 (80%)0.480
 Total4 (10%)10 (17%)14 (14%)
Additional open-heart surgeries during the follow-up period
 None30 (77%)50 (85%)80 (82%)0.328
 One8 (20%)7 (12%)15 (15%)0.245
 Two1 (3%)2 (3%)3 (3%)0.816
  • *N/A for 2 cases in the symptomatic group and for 8 in the control group.

  • N/A for 3 cases in the symptomatic group and for 18 in the control group.

  • N/A for 6 cases in the symptomatic group and for 13 in the control group.

  • §N/A for 5 cases in the symptomatic group and for 1 in the control group.