Table 2. Associations of IOP on univariable regression.
| Parameters | P value | |
|---|---|---|
| Grade 1 Children | Grade 7 Children |
|
| General Parameters | ||
| Age | 0.21 | 0.05 |
| Gender# | < .0001 | < .0001 |
| Number of myopic parents† | 0.0089 | 0.002 |
| Height | 0.27 | 0.01 |
| Weight | 0.99 | < .0001 |
| Waist | 0.047 | 0.06 |
| BMI | 0.57 | 0.0004 |
| Birth length | 0.09 | 0.44 |
| Birth weight | 0.10 | 0.57 |
| Birth method** | 0.047 | 0.0003 |
| Gestational weeks | 0.02 | 0.41 |
| Smoking during pregnancy* | 0.85 | 0.67 |
| Living with smoker during pregnancy* | 0.27 | 0.98 |
| Doing Chinese eye exercise* | 0.56 | 0.82 |
| Systolic pressure | < .0001 | < .0001 |
| Diastolic pressure | < .0001 | 0.0009 |
| Mean arterial pressure | < .0001 | < .0001 |
| Age at commencement of reading | 0.99 | 0.003 |
| Maximum time spent reading continuously | 0.26 | 0.13 |
| Distance between face and book when reading /writing | 0.37 | 0.17 |
| Headache during near work* | 0.53 | 0.47 |
| Books read per week | 0.11 | 0.62 |
| Time spent on near work | 0.09 | 0.43 |
| Time spent outdoors | 0.03 | 0.80 |
| Time spent sleeping | 0.0497 | 0.02 |
| Lights on while sleeping at night* | 0.75 | 0.84 |
| Parents smoking status* | 0.17 | 0.008 |
| Water intake per day | 0.60 | 0.04 |
| Freqency for drinking tea | 0.74 | 0.59 |
| Favorite beverage | 0.94 | 0.17 |
| Frequency for drinking coffee | 0.25 | 0.87 |
| Ocular Parameters | ||
| Central corneal thickness | < .0001 | < .0001 |
| Spherical equivalent | < .0001 | < .0001 |
| Axial length | 0.03 | < .0001 |
| Anterior chamber depth | 0.01 | 0.0001 |
| Dominant eye | 0.08 | 0.03 |
| Age of myopia onset | 0.42 | 0.09 |
# male as reference
† 0 as reference
**Normal labour as reference
* Answer ‘no’ as reference