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Table 2 Timing of all follow-up appointments (n = 5795) with the mean difference in PHQ-9 scores for each time period

From: Changes in patient health questionnaire (PHQ-9) scores in adults with medical authorization for cannabis

Follow-up Appointment Time

N (%)

Mean Difference in PHQ-9 Score (95% CI)

p-value

≤7 days

614 (10.6)

0.04 (−0.09, 0.17)

0.547

1 week-3 months

1509 (26.0)

− 0.25 (− 0.36, − 0.14)

< 0.0001

3–6 months

1056 (18.2)

− 0.47 (− 0.67, − 0.27)

< 0.0001

6–12 months

1066 (18.4)

− 0.28 (− 0.41, − 0.14)

0.0001

1–2 years

1193 (20.6)

−0.15 (− 0.29, − 0.01)

0.038

> 2 years

357 (6.2)

−0.24 (− 0.52, 0.04)

0.093