Table 4.

HPT-SD inter-item correlations (n=51–52)

HPT-SD items	Correlation coefficient, r
	HPT-SD item
	1	2	3	4	5	6	7	8	9	10	11	12	13
Item 1. Muscle cramps	–
Item 2. Tingling	0.55	–
Item 3. Numbness	0.60	0.74	–
Item 4. Muscle spasms or twitching	0.75	0.72	0.71	–
Item 5. Feelings of heaviness in arms or legs	0.55	0.61	0.72	0.64	–
Item 6. Physical fatigue	0.50	0.66	0.69	0.57	0.56	–
Item 7. Slowed or confused thinking (brain fog)	0.57	0.43	0.53	0.55	0.68	0.70	–
Item 8. Anxiety	0.30	0.42	0.50	0.48	0.55	0.51	0.63	–
Item 9. Sadness or depression	0.34	0.47	0.49	0.49	0.53	0.57	0.63	0.81	–
Item 10. Impact sleep	0.45	0.50	0.35	0.62	0.32	0.29	0.39	0.50	0.59	–
Item 11. Impact exercise	0.57	0.53	0.59	0.69	0.52	0.63	0.63	0.51	0.69	0.49	–
Item 12. Impact work	0.49	0.62	0.63	0.46	0.66	0.70	0.60	0.61	0.59	0.48	0.67	–
Item 13. Impact relationships	0.24	0.57	0.58	0.53	0.52	0.52	0.56	0.57	0.73	0.45	0.66	0.62	–

Abbreviation: HPT-SD, Hypoparathyroidism Symptom Diary.