Table 3.

Ranges of TSH results for patients tested during the 2-year interval of interest

TSH RESULTS	PARTICIPATING IN CWC INITIATIVE		TOTAL, N

	NO, N (%)^*	YES, N (%)
Most recent TSH levels^†
• Above normal range (> 5.0 mIU/L)	1364 (3.8)	242 (1.4)	1606
• Below normal range (< 0.4 mIU/L)	300 (0.8)	120 (0.7)	420
• Within normal range (0.4–5.0 mIU/L)	33 947 (95.3)	16 785 (97.9)	50 732
Total	35 611 (100.0)	17 147 (100.0)	52 758

CWC—Choosing Wisely Canada, TSH—thyroid-stimulating hormone.
↵* Percentages do not add to 100% owing to rounding
↵† Levels of TSH that were unlikely to be plausible (TSH > 150 mIU/L) were removed.