β†  ± SE# P value 95%CI
Head position(HP) 1.068 ± 0.129 .00* 2.261,3.744
Ocular height (OH) 0.341 ± 0.132 .010* 1.085,1.822
Refraction 0.451 ± 0.138 .001* 1.197,2.059
†β, standardized partial regression coefficient. # SE, standard error. * p value <0.05
Table 4: Effect of risk factors of headache.