Table 5.

Mean electrolyte levels between cases of prolonged labour and controls.

Variable	Cases Mean (SD)	Control Mean (SD)	All Mean (SD)	P value
K+ (mmol/L)	6.4 (0.2)	4.1 (0.3)	5.1 (1.0)	<0.001
Na+ (mmol/L)	150.6 (8.1)	131.7 (2.8)	142.2 (7.6)	<0.001
Cl− (mmol/L)	111.9 (5.7)	99.0 (4.0)	103.4 (6.2)	<0.001
Urea (mmol/L)	11.1 (3.6)	4.7 (1.0)	6.9 (3.8)	<0.001
Bicarbonate (mmol/L)	17.6 (3.2)	23.8 (2.4)	21.2 (3.7)	<0.001
Creatinine (μmol/L)	111.2 (12.7)	62.1 (12.2)	86.5 (25.4)	<0.001
Ketonuria
Present	87 (91.6)	2 (1.9)	89 (44.5)	<0.001
Absent	8 (8.4)	103 (98.1)	111 (55.5)