Fig. 1From: Opting to wear prismatic spectacles was associated with reduced neck pain in dental personnel: a longitudinal cohort studyDistribution of the study population (N=564), of participants in the questionnaire survay (N=366), the clinical examination (N=321) and both assessments (N=123), stratified by intervention group (prismatic glasses; N=371) and reference group (N=193)Back to article page