Table 1 Baseline characteristics of subjects.
Characteristics | VSD group | Non-VSD group |
|---|---|---|
Number, No. (%) | 9400 (100%) | 94,000 (100%) |
Follow-up time, mean (SD), y | ||
Pneumonia | 6.67 (3.14) | 6.96 (3.04) |
Asthma | 7.65 (2.26) | 7.78(2.24) |
No. of male (%) | 4348 (46.26%) | 48,157 (51.23%) |
Birth weight, mean (SD), kg | 3.2 (0.4) | 3.2 (0.4) |
No. of prematurity | 241 (2.56%) | 1400 (1.49%) |
No. of only breast feeding | 2404 (25.57%) | 25,098 (26.70%) |
Birth residence, No. (%) | ||
Seoul & metropolitan | 4452 (47.36%) | 42,321 (45.02%) |
City | 4173 (44.39%) | 43,047 (45.79%) |
Rural | 689 (7.33%) | 7557 (8.04%) |
Calendar year at birth date, No. (%) | ||
2008–2009 | 3377 (35.93%) | 36,741 (39.09%) |
2010–2012 | 6023 (64.07%) | 57,259 (60.91%) |
Income level, No. (%) | ||
Lowest 20% | 987 (10.5%) | 10,170 (10.82%) |
Middle | 5611 (59.69%) | 55,868 (59.43%) |
Top 20% | 2457 (26.14%) | 24,106 (25.64%) |
Allergic disease comorbidity, No. (%) | ||
Allergic rhinitis | 2974 (31.55%) | 28,365 (30.18%) |
Atopic dermatitis | 789 (8.39%) | 8089 (8.61%) |
Admission during the first year after birth date | ||
0 times | 5152 (54.81%) | 68,408 (72.77%) |
≥ 1 times | 4248 (45.19%) | 25,592(27.23%) |
Admission with pneumonia during the first year | ||
0 times | 8689 (92.44%) | 88,317 (93.95%) |
≥ 1 times | 711 (7.56%) | 5683 (6.05%) |
Admission with wheezing during the first year | ||
0 times | 7808(83.06%) | 84,032(89.40%) |
≥ 1 times | 1.592 (16.94%) | 9968 (10.60%) |
Diagnosis type, No. (%) | 9400 (100.0%) | |
Q21.0 Ventricular septal defect | 2235 (23.78%) | NA |
Q21.00 Muscular ventricular septal defect | 1248 (13.28%) | NA |
Q21.01 Perimemberance ventricular septal defect | 1771 (18.84%) | NA |
Q21.08 Other ventricular septal defect | 1179 (12.54%) | NA |
Q21.09 Ventricular septal defect, unspecific | 2967 (31.56%) | NA |
