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. 2017 Jul 5;74(7):740–746. doi: 10.1001/jamapsychiatry.2017.0995

Table 3. Risk of Mental Disorders in Individuals With Positive Streptococcal Test Results, by Time Since the Last Positive Test Resulta.

Time Since the Last Positive Streptococcal Test, y Any Mental Disorder OCD Tic Disorders
No. IRRb (95% CI) No. IRRb (95% CI) No. IRRb (95% CI)
No test performed 13 712 1 [Reference] 316 1 [Reference] 522 1 [Reference]
<1 2482 1.09 (1.04-1.14)c 57 1.38 (1.03-1.86)c 128 1.17 (0.96-1.42)
1-2 4094 1.19 (1.15-1.24)c 96 1.30 (1.02-1.65)c 263 1.34 (1.15-1.55)c
3-5 4376 1.25 (1.20-1.30)c 155 1.53 (1.24-1.89)c 368 1.57 (1.37-1.79)c
6-10 3596 1.19 (1.14-1.24)c 202 1.67 (1.37-2.04)c 213 1.19 (1.01-1.41)c
≥11 860 1.17 (1.08-1.26)c 46 1.57 (1.12-2.21)c 21 1.17 (0.74-1.86)

Abbreviations: IRR, incidence rate ratio; OCD, obsessive-compulsive disorder.

a

The streptococcal test was the rapid antigen diagnostic test for group A β-hemolytic streptococcal throat infections.

b

Adjusted for sex, age, and calendar year.

c

The reference interval did not include 1 [Reference].