From: The biometric parameters of aniso-astigmatism and its risk factor in Chinese preschool children: the Nanjing eye study
Multivariate analysis
Risk factors
Adjusted OR
95% CI
P
Twin or triple (Yes vs No)
2.43
1.05–5.60
0.04
Term delivery
 Full-term
Reference
 Pre-term
2.60
1.09–6.15
0.03
 Post-term
3.61
1.31–9.96
0.01