Patient’s Group No. of Patients Ala67Thr References
Post-Polio syndrome 110 50 (45.46%) Present study
Paralytic poliomyelitis 6 1(16.7%) [23]
Amyotrophic lateral sclerosis (ALS) 110 13 (11.8%) [22]
Vaccine Associated Paralytic Poliomyelitis (VAPP) 9 1 (11.1%) [23]
Progressive muscular atrophy (PMA) 30 6 (20%) [22]
Controls 200 10 (5%) Present study
Controls 280 19 (6.8%) [22]
Controls 56 4 (7.1%) [20]
Controls 493 37 (7.5%) [21]
Total of all controls 1029 70 (6.8%)  
Table 3: Distribution of Ala67Thr mutation in the PVR gene among different study groups.