Model/parameter | Change in ln(Hbmass) from prevalues | Percentage of increase in Hbmass | ||||
---|---|---|---|---|---|---|
Estimate | 95% CI | p Value | Time at altitude (h) | Estimate | 95% CI | |
Linear* | ||||||
slope | 1.07×10^{−4} | (0.94×10^{−4} to 1.20×10^{−4}) | <0.001 | 100 | 1.08 | (0.94 to 1.21) |
Quadratic* | ||||||
Linear | 1.39×10^{−4} | (1.10×10^{−4} to 1.69×10^{−4}) | <0.001 | 100 | 1.33 | (1.10 to 1.56) |
Quadratic | −7.59×10^{−8} | (−13.95×10^{−8} to −1.23×10^{−8}) | 0.021 | 200 | 2.52 | (2.14 to 2.89) |
300 | 3.56 | (3.13 to 4.00) | ||||
Time as a factor (h) | ||||||
18–24 | 0.22×10^{−4} | (−0.80×10^{−4} to 1.23×10^{−4}) | 0.664 | 18–24 | 0.22 | (−0.80 to 1.24) |
96–112 | 1.29×10^{−4} | (0.66×10^{−4} to 1.93×10^{−4}) | <0.001 | 96–112 | 1.30 | (0.66 to 1.95) |
144–224 | 2.41×10^{−4} | (1.82×10^{−4} to 3.01×10^{−4}) | <0.001 | 144–224 | 2.44 | (1.84 to 3.06) |
266–294 | 3.25×10^{−4} | (2.50×10^{−4} to 4.00×10^{−4}) | <0.001 | 266–294 | 3.30 | (2.53 to 4.08) |
312–364 | 3.89×10^{−4} | (3.09×10^{−4} to 4.70×10^{−4}) | <0.001 | 312–364 | 3.97 | (3.14 to 4.81) |
408–456 | 4.00×10^{−4} | (2.91×10^{−4} to 5.09×10^{−4}) | <0.001 | 408–456 | 4.08 | (2.95 to 5.22) |
504–672 | 6.28×10^{−4} | (4.96×10^{−4} to 7.59×10^{−4}) | <0.001 | 504–672 | 6.48 | (5.09 to 7.89) |
*For the linear and quadratic models, the time at altitude is measured in hours so that, for example, the linear model implies an increase in ln(Hbmass) of 0.0107/100 h, which translates to an increase of 1.08% in Hbmass.
p Values refer to testing whether the associated parameter is equal to zero.
Hbmass, haemoglobin mass; ln(Hbmass); natural log of Hbmass.