Table 2

Comparison of clinical and biochemical parameters (mean±SD) in idiopathic and secondary hypokalaemic paralysis

ParametersType of periodic paralysisp Value
Idiopathic (N=17)Secondary (N=13)
Respiratory paralysis (N)150.06
Recurrence of attacks
 Present (N)651.00
 Absent (N)118
Weakness (MRC grade)2.47±1.061.77±1.580.185
Time to improve (h)26.47±16.0254.46±24.300.002
Serum K+ (mmol/l)2.61±0.591.71±0.470.001
Haemoglobin (g/l)140.35±14.46129.23±21.950.130
Serum calcium total (mmol/l)2.31±0.172.09±0.150.001
Serum inorganic phosphate (mmol/l)1.05±0.271.03±0.420.90
Serum alkaline phosphatase (μkat/l)2.70±1.023.09±0.930.28
Serum creatinine (mmol/l)91.31±19.68104.17±37.530.28