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International Journal of Bipolar Disorders

Table 3 Estimated parameters explaining age of onset for patients with bipolar I disorder below a threshold of mean monthly kJ/m2/day of 0.75 UVB light for 1 or more months during the year (N = 6972)

From: Exploratory study of ultraviolet B (UVB) radiation and age of onset of bipolar disorder

   

99% Confidence Interval

Coefficient Significance

Parameters

Coefficient estimate (β)

Standard Error

Lower

Upper

Wald Chi-squared

P

Intercept

40.300

1.0867

38.107

42.429

1375.305

 < 0.001

Family history of mood disorders

− 1.914

0.2316

− 2.368

− 1.460

68.309

 < 0.001

Cohort age groups

      

 DOB after 1979

− 19.768

1.0344

− 21.796

− 17.741

365.219

 < 0.001

 DOB 1979–1960

− 13.575

1.0509

− 15.635

− 11.516

166.865

 < 0.001

 DOB 1959–1940

− 7.509

1.0339

− 9.536

− 5.483

52.750

 < 0.001

 DOB before 1940

0

     

UVB kJ/m2/day < 0.75 for 1 or more months

− 1.663

0.4853

− 2.614

− 0.712

11.739

 < 0.001

  1. Dependent variable: Age of onset (years). Model: intercept, family history of mood disorders (Y/N), cohort age groups, UVB kJ/m2/day < 0.75 for 1 or more months (Y/N). All Sidak pairwise comparisons between family history of mood disorders and cohort age groups were significant at the < 0.001 level
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