Table 2.

Focused random effects panel regression of log₁₀ microbial concentration depending on material, strain and timeslot.

log(CFU)	Coef.	St.Err.	t-Value	p-Value	95% Conf	Interval	Sig.
S. epidermidis CIP 8155T	0	Reference level for microorganisms
C. albicans ATCC 10231	0.341	0.128	2.65	0.008	0.089	0.592
C. albicans clinical	0.098	0.128	0.77	0.444	−0.153	0.350
E. coli ATCC 25929	0.265	0.128	2.07	0.039	0.014	0.517
E. coli ESBL clinical	0.551	0.128	4.30	0.000	0.210	0.803	*
MRSA ATCC 33592	0.537	0.128	4.19	0.000	0.286	0.789	*
MRSA clinical strain	0.221	0.128	1.72	0.085	−0.030	0.472
S. aureus ATCC 29213	0.545	0.128	4.25	0.000	0.294	0.796	*
Polyglecaprone 25	0	Reference level for suture materials
Polyglactin 910	0.071	0.079	0.90	0.369	−0.083	0.225
Polydioxanone	−0.008	0.079	−0.11	0.915	−0.162	0.146
0 h	0	Reference level for hours
4	−1.795	0.063	−28.28	0.000	−1.919	−1.670	*
8	−2.148	0.063	−33.85	0.000	−2.273	−2.023	*
24	−1.936	0.063	−30.50	0.000	−2.060	−1.811	*
Overall model intercept	5.392	0.109	49.64	0.000	5.179	5.605	**
Number of obs		576		Number of groups		144
Wald Chi-squared		df = 12		p-value		<0.0001
R-squared		0.687

P. aeruginosa and NTS not included in the focused model; * p < 0.001, ** p < 0.005, Sig.: significant, df: degrees of freedom, St. Err.: standard error. Hausman test: p = 1. Breusch and Pagan Lagrangian multiplier test (LM) for random effects: p-value < 0.0001.