One of their favorite topics was their childhoods, not so much the pleasures as the fog of comical misconceptions from which they had emerged, and the various parental errors and outdated practices they could now forgive.
However, this protective effect was lost after two significant confounders, namely age and parental refractive error, were adjusted.
Parental refractive error was defined as the average of non-cycloplegic SE of the father and the mother (four eyes), as the influence of either parent remains unknown.
It is also noteworthy that our study had some information bias, because 23.5% of the parental refractive error was obtained through self-reporting.
Parental refractive error was defined as the average of the non-cycloplegic SE for each eye for the combined father and mother [ 26].
Both univariate and multiple (after adjusting for children's age, gender, average parental refractive error, near work, and outdoor activity hours) logistic regressions for myopia involving the different items of the eye exercises of acupoints questionnaire were performed.
Multiple β coefficient*: adjusted for children's age, gender, average parental refractive error, times spend on near work and outdoor, and item of eye exercises questionnaire; column 3 presented the OR (95% CI) of item of eye exercises questionnaire.
However, the OR was not significant after adjusting for children's age, gender, parental refractive error, and time spend on near work and outdoor activity (OR, 95% CI: 0.71, 0.41-1.24).
About 186 (23.5%, 186/790) parental refractive error readings (138 fathers and 48 mothers) were obtained by self-report through a telephone call, as they could not visit the clinical centre.
