Table 3.

Regression estimates for yearly decline obtained from Monte Carlo simulations (synthetic Crawford et al. (C)/Valentin et al (V) data) including data for women and men from the Crawford et al. study

Endpoint	Variable	Iteration	n	Mean	Std. Dev.	Min	Max
MF + ES C (women)	b(age)	10000	40	0.162	0.099	−0.222	0.502
	se(b)	10000	40	0.087	0.013	0.046	0.142
Multifidus C (women)	b(age)	10000	40	0.185	0.114	−0.341	0.632
	se(b)	10000	40	0.105	0.014	0.057	0.159
Erector Spinae C (women)	b(age)	10000	40	0.153	0.090	−0.183	0.486
	se(b)	10000	40	0.079	0.013	0.040	0.133
MF + ES C (men)	b(age)	10000	40	0.175	0.044	−0.005	0.328
	se(b)	10000	40	0.048	0.006	0.027	0.077
Multifidus C (men)	b(age)	10000	40	0.299	0.063	0.077	0.544
	se(b)	10000	40	0.070	0.009	0.040	0.102
Erector Spinae C (men)	b(age)	10000	40	0.113	0.032	−0.001	0.232
	se(b)	10000	40	0.035	0.005	0.021	0.055
MF + ES C	b(age)	10000	80	0.169	0.060	−0.072	0.370
	se(b)	10000	80	0.055	0.005	0.037	0.080
Mulitfidus C	b(age)	10000	80	0.244	0.071	−0.036	0.509
	se(b)	10000	80	0.068	0.006	0.044	0.094
Erector Spinae C	b(age)	10000	80	0.132	0.059	−0.088	0.435
	se(b)	10000	80	0.051	0.005	0.036	0.070
Psoas V	b(age)	10000	24	0.044	0.024	−0.048	0.126
	se(b)	10000	24	0.024	0.004	0.012	0.041
Multifidus V	b(age)	10000	24	0.105	0.048	−0.064	0.297
	se(b)	10000	24	0.048	0.007	0.025	0.074
Erector Spinae V	b(age)	10000	24	0.072	0.034	−0.088	0.208
	se(b)	10000	24	0.034	0.005	0.017	0.055
MF + ES V	b(age)	10000	24	0.088	0.040	−0.061	0.239
	se(b)	10000	24	0.040	0.006	0.018	0.062

b(age) regression estimate of yearly decline per age year, se(b) standard error of b(age), Iteration number of iterations in the Monte Carlo simulation, n sample size, Std. Dev. standard deviation