Table 2.

A comparison of athlete blood results in the non-steroidal anti-inflammatory medication (NSAID) and control groups [a]. These were then subdivided into those taking an NSAID the morning of the marathon (mNSAID group) [b] and those taking an NSAID during the marathon (dNSAID group) [c]

[a] NSAID use before or during the marathon
	NSAID group (n=16)	Control group (n=12)	P value
Pre-marathon [Na] (mmol/L)	142.8±4.1	140.2±4.4	0.114
Post-marathon [Na] (mmol/L)	140.8±4.4	142.5±1.8	0.161
∆ [Na) (mmol/L)	−2.1±5.7	2.3±4.7	0.039

[b] NSAID use the morning of the marathon
	NSAID group (n=11)	Control group (n=17)	P value
Pre-marathon [Na] (mmol/L)	142.2±4.6	141.4±4.3	0.633
Post-marathon [Na] (mmol/L)	141.4±3.7	141.6±3.6	0.874
∆ [Na] (mmol/L)	−0.8±4.7	0.2±6.3	0.639

[c] NSAID use during the marathon
	NSAID group (n=8)	Control group (n=20)	P value
Pre-marathon [Na] (mmol/L)	144.0±2.6	140.8±4.6	0.074
Post-marathon [Na] (mmol/L)	140.9±4.9	141.8±3.0	0.566
∆ [Na] (mmol/L)	−3.1±6.3	1.0±5.1	0.081

∆, Change from pre-marathon to post-marathon; [Na], Sodium concentration.