Table 2. Multilinear regression of academic performance and refractive error (myopia or hyperopia) in the Yangjiang cohort.
| Grade | N | Hyperopia/β (P value) | Myopia/β (P value) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Total score | Chinese | Mathematics | English | Total score | Chinese | Mathematics | English | |||
| 1 | 327 | −0.04 (0.01) | −0.06 (0.02) | −0.02 (0.01) | NA | −0.01 (0.20) | −0.01 (0.20) | −0.003 (0.45) | NA | |
| 2 | 219 | −0.02 (0.57) | −0.02 (0.67) | −0.02 (0.55) | NA | 0.01 (0.18) | 0.01 (0.25) | 0.01 (0.21) | NA | |
| 3 | 151 | 0.03 (0.37) | 0.05 (0.31) | 0.01 (0.82) | 0.03 (0.30) | 0.002 (0.77) | 0.004 (0.60) | 0.003 (0.62) | −0.002 (0.66) | |
| 4 | 235 | −0.02 (0.72) | −0.04 (0.36) | 0.03 (0.55) | −0.03 (0.49) | 0.01 (0.26) | 0.01 (0.29) | 0.01 (0.18) | 0.01 (0.56) | |
| 5 | 278 | −0.07 (0.21) | −0.08 (0.05) | −0.12 (0.16) | −0.01 (0.91) | 0.01 (0.38) | 0.01 (0.20) | 0.01 (0.39) | 0.002 (0.73) | |
| 6 | 298 | −0.003 (0.97) | 0.02 (0.78) | 0.02 (0.88) | −0.06 (0.59) | 0.02 (0.04) | 0.02 (0.04) | 0.02 (0.14) | 0.03 (0.02) | |
| 7 | 222 | 0.07 (0.22) | NA | NA | NA | 0.01 (0.61) | NA | NA | NA | |
| 8 | 137 | NA | NA | NA | NA | 0.04 (0.002) | NA | NA | NA | |
| 9 | 104 | NA | NA | NA | NA | −0.02 (0.48) | NA | NA | NA | |
Data are presented β with the corresponding P value. NA: not available (lacking an adequate sample size for statistical analyses; students in grade one do not have English lessons).