History of primary headache is a risk factor of HAH in our study, which is in agreement with that migraine increased both the frequency and severity of HAH [21], but in contrast to a study that migraine history did not affect HAH [22].
Hah! 11.29am: Nancy again.
A reduced SpO2 and increased HR are independent risk factors for HAH [8, 9].
It has been reported that younger age is a risk factor for HAH [9].
This mechanism has been proposed for those individuals who suffer from High Altitude Headache (HAH) [11].
History of migraine, low arterial oxygen saturation (SaO2) value, high rating of perceived exertion and low fluid intake contribute to the development of HAH [10].
Furthermore, most of these studies have been conducted in mountaineers, which may not reflect representative properties of HAH [5, 9, 12].
Previous studies have demonstrated that increased heart rate (HR) and self-anxiety scores, lower saturation pulse oxygen (SpO2) and a history of primary headache are all independent risk factors for HAH [8, 9].
A 2 × 2 factorial arrangement was used; fair-quality AH [FAH; 39.6% neutral detergent fiber (NDF) and 17.9% crude protein (CP)] or high-quality AH (HAH; 33.6% NDF and 21.9% CP) was combined with steam-flaked corn (SFC) or HMC to form 4 treatments: FAH with SFC, FAH with HMC, HAH with SFC, and HAH with HMC.
While most previous studies have focused on the risk factors and epidemiology of HAH, few of them give proper attentions to the hemodynamic characteristics of HAH [8, 9, 7].
Boasting to PC World today, AT&T CTO John Donovan confirmed the numbers, and also said that the growth of mobile data uptake over the last three years has slowed from the 50x increase seen a few months ago, to a mere (hah) 30x growth rate.
