1.adherence to sth
(to rule, agreement, belief)对某事物的遵循(或遵守)
strict adherence to the constitution对宪法的严格遵守
2.<正式>(to religion, political party)追随；拥护；坚持；信奉
Now one can view the effects of not only demographic change but change in religious adherence.现在人们可以审视人口变化以及宗教信仰变化的影响。