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Table 1 Prevalence of aniso- total astigmatism stratified by sex and age

From: The biometric parameters of aniso-astigmatism and its risk factor in Chinese preschool children: the Nanjing eye study

Characteristics N (%) Vectorial aniso-TA a
N (%, 95 CI)
P Non-vectorial aniso-TA b
N (%, 95 CI)
P
Sex    0.77   0.74
 Boys 603 (53.3%) 22 (3.65%, 2.15–5.15)   13 (2.16%, 0.99–3.32)  
 Girls 528 (46.7%) 22 (4.17%, 2.46–5.88)   9 (1.70%, 0.60–2.81)  
Age (month)    0.82   0.71
 61–66 546 (48.3%) 20 (3.66%, 2.08–5.24)   12 (2.20%, 0.95–3.43)  
 67–72 685 (51.7%) 24 (3.50%, 2.12–4.88)   10 (1.71%, 0.66–2.76)  
Total 1131 (100%) 44 (3.89%, 2.76–5.02)   22 (1.95%, 1.14–2.75)  
  1. N number, CI confidence interval
  2. aVectorial aniso-TA was defined as a difference of ≥0.5 in J0 or J45 between the two eyes
  3. bNon-vectoral aniso-TA was defined as the difference of ≥1.0 diopter cylinder in absolute cylinder between the two eyes regardless of axis
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