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. Author manuscript; available in PMC: 2023 Sep 22.
Published in final edited form as: J AAPOS. 2021 Apr 24;25(3):172–175. doi: 10.1016/j.jaapos.2021.01.003

Table 3.

Value of t statistics and P values for pairwise comparisons

Comparison group, age, yearsb
Age, years No. participantsa Mean 8 9 10 11 12 Adult
7 58 −0.02 t = 3.50
0.0006		 t = 3.49
0.0006		 t = 3.15
0.002		 t = 3.10
0.002		 t = 3.24
0.001		 t = 4.45
0.0008
8 45 −0.06 — 0.23 0.94 0.96 0.51 0.13
9 35 −0.06 — — 0.64 0.67 0.86 0.35
10 37 −0.06 — — — 0.98 0.56 0.19
11 30 −0.06 — — — — 0.59 0.22
12 30 −0.07 — — — — — 0.49
Adult 38 −0.08 — — — — — —
a

Each participant contributed data from two eyes; statistical analysis considered the correlation between the visual acuities of the two eyes of individuals.

b

For the 21 pairwise comparisons, Bonferroni correction requires P ≤ 0.002. P values are given for all pairwise comparisons, along with the value of the t-statistics for comparisons associated with a P-value that met this criterion.