Volunteers' pre- and postmarathon [Na+] and change in [Na+]
| Volunteers (n=88) | ||||||
|---|---|---|---|---|---|---|
| Hyponatraemic (n=11) | Non-hyponatraemic (n=77) | |||||
| [Na+] (mmol/l) | Mean (SD) | Range | Mean (SD) | Range | p-Value* | 95% CI |
| Premarathon | 138 (1.8) | 135–140 | 140 (1.4) | 136–143 | 0.010 | −2.1, −0.3 |
| Postmarathon | 132 (2) | 128–134 | 139 (2) | 135–143 | <0.001 | −8.2, −5.5 |
| Change | −6 (1.4) | −8 to −4 | −1 (2) | −5 to 4 | <0.001 | −6.9, −4.4 |
↵* Continuous variables were analysed with independent t tests.