Table 1. Comparisons between non-syndromic and syndromic PMV patients.
| Clinical presentation | Non-syndromic PMV | Syndromic PMV | |||||
| n | % | n | % | Test | χ2 | p | |
| Case number | 287 | 87,0 | 43 | 13,0 | Chi-square | 360,8 | <0.001 |
| Gender | 0,1 | 1,000 | |||||
| Male (n=135) | 128 | 94,8 | 7 | 5,2 | Chi-square | ||
| Female (n=101) | 95 | 94,1 | 6 | 5,9 | Chi-square | ||
| Child/adult | 26,8 | <0.001 | |||||
| Child (n=166) | 145 | 87,3 | 21 | 12,7 | Chi-square | ||
| Adult (n=58) | 32 | 55,2 | 26 | 44,8 | Chi-square | ||
| Asymptomatic (n=26) | 25* | 26,3 | 1 | 8,3 | Fisher exact | 1,9 | 0,286 |
| Symptomatic (n=81) | 70 | 73,7 | 11 | 91,7 | Chi-square | 1,9 | |
| Heart failure | 38 | 54,3 | 1 | 9,1 | Fisher exact | 7,8 | 0,007 |
| Dyspnea/tachypnea | 14 | 20,0 | 8 | 72,7 | Chi-square | 13,4 | 0,001 |
| Associated cardiac anomaly | |||||||
| Coarctation of the aorta | 82 | 28,6 | 33 | 76,7 | Chi-square | 38,2 | <0.001 |
| Bicuspid aortic valve | 63 | 22,0 | 30 | 69,8 | Chi-square | 68,3 | <0.001 |
| Hypoplastic left ventricle | 36 | 12,5 | 0 | 0 | Fisher exact | ||
| Atrioventricular septal defect | 26 | 9,1 | 0 | 0 | Fisher exact | 4,2 | 0,034 |
| Subaortic obstruction | 25 | 8.7 | 12 | 27,9 | Chi-square | 13,8 | 0.001 |
| Tricuspid regurgitation | 3 | 1.0 | 4 | 9.3 | Fisher exact | 12.3 | 0.007 |
| Anomalous origin of coronary artery | 1 | 0.3 | 2 | 4.7 | Fisher exact | 7.7 | 0.046 |
| Left superior vena cava | 1 | 0.3 | 7 | 16.3 | Fisher exact | 40.1 | <0.001 |
| Supravalvular aortic stenosis | 1 | 0.3 | 3 | 7.0 | Fisher exact | 13.7 | 0.008 |
| PMV: parachute mitral valve; * One of the asymptomatic patients developed dyspnea later.[41] | |||||||