Table 1 Distribution of subjects by year of survey
2015 (n = 107) | 2016 (n = 103) | 2017 (n = 104) | 2018 (n = 106) | 2019 (n = 90) | 2021 (n = 83) | χ2 | p | ||
|---|---|---|---|---|---|---|---|---|---|
Age, months | 63, 53–70 | 59, 53–71 | 62, 57–68 | 62, 53–71 | 61, 56–70 | 61, 51–68 | 1.11 | 0.953 | |
Grade, n | First (age 3 years) | 25 | 27 | 20 | 27 | 20 | 26 | ||
Second (age 4 years) | 41 | 38 | 46 | 33 | 37 | 25 | 8.05 | 0.624 | |
Third (age 5 years) | 41 | 38 | 38 | 46 | 33 | 32 | |||
Sex, n | Boys | 56 | 58 | 52 | 46 | 44 | 45 | 4.22 | 0.518 |
Girls | 51 | 45 | 52 | 60 | 46 | 38 |