Table 2. HR and (95% CI) of myopia progression (−0·5 D) according to a previous pregnancy. Cox models for repeated measurements.

	No pregnancy in any follow-up questionnaire	At least one pregnancy in any follow-up questionnaire	P
Incident cases of myopia	1159	116
Person-years	21 524	3656
Crude HR	1 (ref.)	0.60 (0.51–0.72)	<0.001
Age-adjusted HR	1 (ref.)	0.57 (0.48–0.68)	<0.001
Multivariable-adjusted HRa	1 (ref.)	0.58 (0.49–0.69)	<0.001

^aAdjusted for age, body mass index, smoking, alcohol, adherence to the Mediterranean diet, outdoors physical activity, time of television watching, exposure to computer, educational level, sleeping hours, and total energy intake.