Electrolyte disturbances by month of year
| Hypernatraemia | Hypokalaemia | |||
|---|---|---|---|---|
| Month | >150 mmol/l | >160 mmol/l | <3.5 mmol/l | <2.0 mmol/l |
| February 1996/97 (n=489) | 12 (2.5%) | 2 (0.4%) | 287 (58.7%) | 35 (7.2%) |
| August 1996/97 (n=259) | 28 (10.8%) | 13 (5.0%) | 76 (29.01%) | 1 (0.4%) |
| Prevalence ratio (95% CI) | 0.23 (0.12 to 0.44) | 0.08 (0.02 to 0.36) | 2.0 (1.6 to 2.5) | 19 (2.6 to 135) |