Table 4.

Predictions of stress at the point of failure from tree morphometric data and wood strength (MOR) for all trees, stem failures, and codominant failures.

Variable^{^z}		All trees				Stem failures				Codominant failures
Variable^{^z}		n	Estimate (SE)	P	RMSE/R²	n	Estimate (SE)	P	RMSE/R²	n	Estimate (SE)	P	RMSE/R²
	B^{^y}	21	42,214(17,428)	0.0256	21,270/0.00	10	5,444 (38,969)	0.8923	20,780/0.14	10	31,337(15,404)	0.0724	15,536/0.00
MOR (kPa)	β^{^y}		−0.052 (0.250)	0.8369			0.71 (0.61)	0.2803			−0.04 (0.21)	0.8517
Tree height (m)	B	24	42,050 (16,419)	0.0182	23,034/0.00	11	77,714(21,133)	0.0051	19,827/0.16	12	22,006 (16,723)	0.2176 :	16,695/0.00
	β		−288 (913)	0.7553			−1,473 (1126)	0.2232			132 (975)	0.8954
	B	24	70,256 (16,289)	0.0003	20,581/0.17	11	86,741 (22,942)	0.0043	19,084/0.22	13	31,329(19,047)	0.1282	16,347/0.01
dbh (m)	β		−52,155 (24,778)	0.0469			−62,068 (38,776)	0.1439			−8,879 (26,930)	0.7478
dbh (m)	B	23	27,513 (14,226)	0.0667	22,813/0.02	11	52,749(29,128)	0.1036	21,627/0.00	12	21,420(11,718)	0.0975	6,655/0.01
Slenderness	β		324 (454)	0.4828			−48.8 (890)	0.9575			100 (391)	0.8024
Crown height (m)	B	16	75,623 (34,499)	0.0458	22,849/0.08	9	55,667 (37,272)	0.1789	20,957/0.00	7	94,889 (68,880)	0.2268	19,376/0.18
Crown height (m)	β		−2,435 (2229)	0.2932			−408 (2477)	0.8737			−4,385 (4,243)	0.3487
Crown width (m)	B	16	75,623 (34,499)	0.0458	22,849/0.08	7	90,734 (23,481)	0.0118	13,441/0.46	7	45,985 (29,390)	0.1927	21,372/0.11
Crown width (m)	β		−2,435 (2229)	0.2932			−2,967 (1432)	0.0931			−1,504 (2159)	0.5245
Stem volume (m³)	B	23	49,156(9,816)	0.0001	22,092/0.08	11	64,497 (10,547)	0.0002	19,314/0.20	12	29,673 (13,276)	0.0494	16,547/0.02
	β		−1,716(1233)	0.1786			−1,927 (1274)	0.1646			−770 (1733)	0.6661
	B	24	48,830 (7,232)	0.0001	20,799/0.15	11	64,419 (9,838)	0.0001	18,949/0.23	13	27,241 (8,411)	0.0079	16,368/0.01
(dbh)³ (m³)	β		−37,601 (18,834)	0.0584			−58,430 (35,380)	0.1330			−5,229 (18,409)	0.7817

↵^zdbh = diameter at breast height; slenderness = tree height/dbh; stem volume = tree height*(dbh)².
↵^yB, β = intercept and slope, respectively, of best fit line for the plot of stress at the point of failure and the variable listed in the first column.
SE = standard error; RMSE = root mean square error.