To evaluate the effect of caffeine compared with theophylline treatment on the risk of apnea and use of mechanical ventilation in preterm infants with recurrent apnea. Subgroup analyses: 1  Outcomes of different doses of caffeine or theophylline. 2  Outcomes of infants born at different gestational ages or birth weights.here is some evidence that caffeine is as effective as theophylline in the short-term for reducing apnea in premature babies, is better tolerated and is easier to give. Apnea is a pause in breathing of greater than 20 seconds.
If the equator is projected outward to the celestial sphere, forming the celestial equator, it crosses the ecliptic at two points known as the equinoxes. The Sun, in its apparent motion along the ecliptic, crosses the celestial equator at these points, one from south to north, the other from north to south.
The first of these is the equator. The equator, located at 0Â°, is the longest line of latitude on Earth at 24,901.55 miles (40,075.16 km). It is significant because it is the exact center of the Earth and it divides that Earth into the Northern and Southern Hemispheres.he equator is a line going around Earth and is halfway between the North and South Poles, it is given a latitude of 0Â°. Values increase north of the equator and are considered positive and values south of the equator decrease and are sometimes considered negative or have south attached to them.