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Table 3 Sensitivity analysis

From: Association of migraines with brain tumors: a nationwide population-based study

Presence of prior migraines

Excluding patients who received a first-time migraine diagnosis within 1 year prior to the index date

Excluding patients who received a first-time migraine diagnosis within 2 years prior to the index date

Excluding patients who received a first-time migraine diagnosis within 3 years prior to the index date

Patients with a brain tumor n = 11,184

Controls n = 11,307

Patients with a brain tumor n = 11,136

Controls n = 11,294

Patients with a brain tumor n = 11,104

Controls n = 11,169

Yes

415 (3.71)

217 (1.92)

368 (3.30)

204 (1.81)

337 (3.03)

183 (1.62)

No

10,769 (96.29)

11,090 (98.08)

10,760 (97.57)

11,090 (98.19)

10,767 (96.97)

11,090 (99.29)

OR a(95% CI)

1.99*** (1.68~ 2.34)

1.00

1.87*** (1.57~ 2.23)

1.00

1.91*** (1.59~ 2.29)

1.00

  1. Notes: aConditional logistic regression conditioned on patient’s age, sex, monthly income, geographic region, and urbanization level; *** p < 0.001; OR odds ratio, CI confidence interval