TABLE 2.

The output of the LLMs for mean chain length, EO fraction, and stretching peak position.

		Mean chain length		EO fraction		Wavenumber cm−1
		Estimate	p-value	Estimate	p-value	Estimate	p-value
	Intercept	46.76	<0.001	0.107	<0.001	2848.60	<0.001
Effect size	Stripped	−0.37	<0.001	+0.011	0.007	+0.02	0.622
	Treated	+0.33	<0.001	+0.014	<0.001	+0.09	0.013
	Depth	+0.08	0.366	+0.003	0.537	−0.17	<0.001
Interactions	Stripped*depth	+0.29	0.021	+0.012	0.043	+0.26	<0.001

The mean chain length and EO fraction were calculated excluding ceramides NS C44 and EOS C66. The the wavenumber in cm⁻¹ of the stretching peak position was calculated using the center of gravity at 90% peak height. As fixed factors stripped, treated, and depth were used. The intercept was the control site at a depth of 5–8 tape-strips or for spectra of tapes 2–10.