Table 2.

Descriptive summary of PPCS participant characteristics. Clinical questionnaire (RPQ, PCSC, HIT-6, MoCA, DHI and QOLIBRI) scoring ranges and total scores are reported. DHI: Dizziness Handicap Inventory; HIT-6: Headache Impact Test; MoCA: Montreal Cognitive Assessment; NSAID: non-steroidal anti-inflammatory drug; PCSC: Postconcussional Syndrome Checklist; QOLIBRI: Quality of Life after Brain Injury scale; RPQ: Rivermead Post Concussion Symptoms Questionnaire; SNRI: serotonin-norepinephrine reuptake inhibitors; SSRI: selective serotonin reuptake inhibitor.

Injury characteristics and clinical questionnaire scores
Months since injury, mean (range)	23 (3–60)
Mechanism of injury, n (%)
Sports/recreational play	12 (41 %)
Motor vehicle collision	7 (24 %)
Fall	6 (21 %)
Assault	1 (3 %)
Other	3 (10 %)
Loss of consciousness, n (%)
Yes	8 (28 %)
No	16 (55 %)
Unknown	5 (17 %)
Number of lifetime mTBI, mean (range)	3 (1–6)
Medications, n (%)
Amitriptyline	6 (21 %)
Botox	4 (14 %)
Cholesterol and/or BP-related	3 (10 %)
Levothyroxine	1 (3 %)
Lyrica	2 (7 %)
Menopausal hormone therapy	2 (7 %)
NSAID	4 (14 %)
SNRI	2 (7 %)
SSRI	4 (14 %)
Synthroid	1 (3 %)
Triptan	3 (10 %)
Vyvanse	1 (3 %)
Zopiclone	2 (7 %)
Questionnaires, mean (s.d.)
RPQ [scoring range: 0–64]	36 (11)
Subscales:
RPQ-3 [scoring range: 0–12]	6 (3)
RPQ-13 [scoring range: 0–54]	29 (10)
PCSC [scoring range: 30–150]	92 (18)
HIT-6 [scoring range: 36–78]	61 (6)
MoCA [scoring range: 0–30]	27 (2)
DHI [scoring range: 0–100]	38 (24)
Subscales:
Physical [scoring range: 0–28]	13 (7)
Emotional [scoring range: 0–36]	10 (9)
Functional [scoring range: 0–36]	15 (9)
QOLIBRI [scoring range: 0–100]	49 (15)
Subscales:
Cognition [scoring range: 0–100]	48 (18)
Self [scoring range: 0–100]	39 (19)
Daily life & autonomy [scoring range: 0–100]	51 (21)
Social relationships [scoring range: 0–100]	59 (19)
Emotions [scoring range: 0–100]	63 (22)
Physical problems [scoring range: 0–100]	39 (22)