Skip to main content

Table 1 Demographics by weight-based sodium intake

From: Prospective Observational Study of Weight-based Assessment of Sodium Supplements on Ultramarathon Performance (WASSUP)

Variable Low sodium intake Mean (SD); Median (min–max) Medium sodium intake Mean (SD); Median (min–max) High sodium intake Mean (SD); Median (min–max) P value
Runner characteristics, n (%) 53 (32.9) 53 (32.9) 55 (34.2)
Age, years 45 (8.4); 45 (24–63) 42 (8.3); 42 (23–56) 41 (9.2); 41 (23–65) 0.06
Sex     0.66
 Female, n (%) 15 (28.3) 19 (35.9) 19 (35)  
 Male, n (%) 38 (71.7) 34 (64.2) 35 (64.8)  
Height, cm 174 (8.8); 175 (157–188) 177 (8.1); 177 (158–193) 175 (8.2); 177 (160–195) 0.3
Weight (starting), kg 76 (13.4); 74 (52–106) 73 (10.9); 74 (58–101) 72 (10.5); 73 (52–94) 0.26
BMI, kg/m2 25 (3.3); 24 (18–34) 23 (2.4); 23 (19–31) 23 (2.7); 23 (18–33) 0.01
Pack weight (starting), kg 10 (2); 10 (7–17) 10 (1.7); 10 (8–15) 10 (1.8); 10 (6–15) 0.37
# prior marathons 13 (15.2); 7 (0–50) 14 (28.8); 3 (0–130) 7 (9.6); 3 (0–40) 0.15
# prior ultramarathons 6 (6.7); 5 (0–35) 11 (14.3); 5 (0–70) 6 (7.3); 4 (0–40) 0.02
Running distance/week, km 72 (35.4); 70 (20–175) 62 (31); 60 (16–160) 81 (93.6); 60 (25–700) 0.28
Greatest running distance/week, km 131 (75.8); 105 (18–300) 132 (79); 105 (20–300) 144 (133.1); 100 (24–700) 0.76
Longest single run 121 (109); 88 (14–700) 118 (83.3); 100 (12–400) 117 (72); 90 (30–330) 0.97
  1. Percentage of missing values from variables of sex, height, pack weight, prior marathons, prior ultramarathons, and training data = < 5% of data
\