Skip to main content
International Journal of Bipolar Disorders

Table 5 Estimated parameters for alternative model explaining a history of suicide attempts for patients with bipolar I disorder (N = 4876)

From: Variations in seasonal solar insolation are associated with a history of suicide attempts in bipolar I disorder

Parameters

   

99% Confidence interval

Coefficient significance

 

Coefficient estimate (β)

Standard error

Exp (β)

Lower

Upper

Wald Chi-squared

P

Intercept

− 1.026

0.2302

0.358

− 1.619

− 0.434

19.885

 < 0.001

Ratio minimum mean monthly insolation/maximum mean monthly insolation

− 0.813

0.2552

0.444

− 1.470

− 0.155

10.136

0.001

State sponsored religion in onset country

− 0.378

0.1127

0.685

− 0.668

− 0.088

11.252

0.001

Male

− 0.612

0.0794

0.542

− 0.816

− 0.407

59.438

 < 0.001

History of alcohol or substance abuse

0.466

0.0730

1.594

0.278

0.655

40.760

 < 0.001

DOB ≥ 1960

0.808

0.2312

2.244

0.213

1.404

12.224

 < 0.001a

DOB ≥ 1940 and DOB < 1960

0.679

0.2085

1.972

0.142

1.216

10.612

0.001a

  1. Dependent variable: history of suicide attempts (yes/no). Model: intercept, ratio minimum mean monthly insolation/maximum mean monthly insolation at onset location, gender, state sponsored religion in onset country (yes/no), alcohol or substance abuse (yes/no) and birth cohort group (DOB < 1940, DOB ≥ 1940 and DOB < 1960, DOB ≥ 1960)
  2. aIndividual parameters Wald Chi-square statistics and significance. The model effects Wald chi-square and significance for the cohort parameter was 12.224 and 0.002, respectively with 2 degrees of freedom
Back to article page