Table 2. Multiple comparisons of contact angles.

(i) group	(j) group	Difference (i–j)	95% Confidence interval		P
			Lower bound	Upper bound
NN	FN	−1.782*	−1.918	−1.645	<0.001
	NN	44.764*	44.627	44.900	<0.001
	PF	1.745*	1.609	1.882	<0.001
FN	NN	1.782*	1.645	1.918	<0.001
	NN	46.545*	46.409	46.682	<0.001
	PF	3.527*	3.391	3.664	<0.001
PN	NN	−44.764*	−44.900	−44.627	<0.001
	FN	−46.545*	−46.682	−46.409	<0.001
	PF	−43.018*	−43.155	−42.882	<0.001
PF	NN	−1.745*	−1.882	−1.609	<0.001
	FN	−3.527*	−3.664	−3.391	<0.001
	NN	43.018*	42.882	43.155	<0.001

Notes.

^*P < 0.05.