Table 2 Univariate analysis of predictive variables (means ± SD, or median & range).

From: The role of maternal age & birth order on the development of unilateral and bilateral retinoblastoma: a multicentre study

Factor

Bilateral

Unilateral

Values

Mean maternal agea ± SD

27.62 ± 5.84

27.37 ± 5.58

F = 0.336, p = 0.563

Median birth order and range

2 (1–9)

2 (1–8)

Independent Samples Mann–Whitney U Test P value = 0.376

Mean GDP per capita ± SD

7566.85 ± 11601.14

9275.02 ± 12861.30

F = 1.872, p = 0.172

  1. aFor ANOVA for maternal age, Log10 transform was used.
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