Table 4.

Percentage of Diameters at the Narrowest Point of the Metacarpal Shaft Based on Commonly Used Headless Compression Screws, Stratified by Direction (Volar-Dorsal and Radial-Ulnar) With the Entire Study Population, Women, and Men.

Sex	Finger	Measurement	% of fingers <2.4 mm	% of fingers ≥2.4 mm	% of fingers ≥3.0 mm	% of fingers ≥3.5 mm	% of fingers ≥4.0 mm
Overall	Index	Radial-ulnar	28.3	71.7	54.7	39.6	19.8
		Volar-dorsal	20.8	79.2	64.2	42.5	28.3
	Middle	Radial-ulnar	29.9	70.1	51.4	40.2	20.6
		Volar-dorsal	16.8	83.2	68.2	51.4	33.6
	Ring	Radial-ulnar	37.0	67.0	34.3	19.4	9.3
		Volar-dorsal	24.1	75.9	55.6	37.0	15.7
	Small	Radial-ulnar	6.5	93.5	72.0	56.5	43.5
		Volar-dorsal	10.2	89.8	64.8	42.6	22.2
Women	Index	Radial-ulnar	30.3	69.7	54.5	39.3	18.2
		Volar-dorsal	15.2	84.8	63.6	45.5	33.3
	Middle	Radial-ulnar	18.2	81.8	51.5	48.5	21.2
		Volar-dorsal	18.2	81.8	66.7	60.6	39.4
	Ring	Radial-ulnar	30.3	69.7	27.3	9.1	3.0
		Volar-dorsal	27.3	72.7	48.5	30.3	6.1
	Small	Radial-ulnar	3.0	97.0	81.2	48.5	33.3
		Volar-dorsal	9.1	90.9	57.6	24.2	3.0
Men	Index	Radial-ulnar	27.4	73.6	54.8	39.7	20.5
		Volar-dorsal	23.3	76.7	64.4	41.1	26.0
	Middle	Radial-ulnar	35.1	64.9	51.4	36.5	20.3
		Volar-dorsal	17.6	82.4	68.9	47.3	31.1
	Ring	Radial-ulnar	40.0	60.0	37.3	24.0	12.0
		Volar-dorsal	22.7	77.3	58.7	40.0	20.0
	Small	Radial-ulnar	6.8	93.2	67.6	60.8	48.6
		Volar-dorsal	10.8	89.2	68.9	51.4	31.1