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Table 2 Linear regression results of AIS prevalence by the geographic latitude. The inclusion of the (Latitude)2 term implies a possible quadratic relationship.

From: Association between adolescent idiopathic scoliosis prevalence and age at menarche in different geographic latitudes

Number of obs=

287939

R-squared=

0.509

 

F ( 2,288036)=

149257.39

Adj R-squared=

0.509

 

(Prob > F )

<0.001

Root MSE=

0.7122

 

Prevalence

Unstandardized coefficient (B)

P > t

95% Conf.

Interval

Latitude

0.024758

< 0.001

0.024045

0.0254713

Latitude^2

0.000484

<0.001

0.000472

0.0004965

Constant (Intercept)

0.712796

<0.001

0.703129

0.7224631