Persistent self-reported health complaints in Norwegians who attribute their symptoms to tick bites or tick-borne disease– a cross-sectional controlled study

Table 4 Health-related questionnaires, health-related quality of life and modern health worries in cases and controls

	Cases	Controls	p-value
PHQ-15 >= 10*	219 (58.6)	414 (14.8)	< 0.001
FSS > = 4	305 (81.3)	770 (33.5)	< 0.001
HADS depression > = 8	109 (26.5)	257 (9.3)	< 0.001
HADS anxiety > = 8	124 (30.1)	490 (17.8)	< 0.001
RAND-36**
Mean physical component summary (PCS)	38.9 95% CI [38.1–39.8]	48.8 95% CI [48.4–49.1]	< 0.001
Summary of the mean mental components (MCS).	45.2 95% CI [44.5–46.1]	51.05 95% CI [50.7–51.4]	< 0.001
Modern Health Worries (MHW)
Mean MHW	2.00 95% CI [1.93–2.08]	1.99 95% CI [1.96–2.02]	0.597

* PHQ-15– Patient Health Questionnaire; FSS - Fatigue Severity Scale; HADS - Hospital Anxiety and Depression Scale
**RAND-36– RAND-36 Item Short Form Health Survey
Continuous variables are presented as mean with 95% confidence intervals and group variables as numbers and percent (%). Statistical analyses with chi-square, Student’s t test and Fisher’s exact test and its p-values

ISSN: 1471-2334