Table 3.

Item fit statistics from the WURSS-21 across the 7 days.

Item	Day 1 INFIT MNSQ	Day 1 OUTFIT MNSQ	Day 2 INFIT MNSQ	Day 2 OUTFIT MNSQ	Day 3 INFIT MNSQ	Day 3 OUTFIT MNSQ	Day 4 INFIT MNSQ	Day 4 OUTFIT MNSQ	Day 5 INFIT MNSQ	Day 5 OUTFIT MNSQ	Day 6 INFIT MNSQ	Day 6 OUTFIT MNSQ	Day 7 INFIT MNSQ	Day 7 OUTFIT MNSQ
I1	1.28	1.4	1.28	1.46	1.29	1.51	1.27	1.44	1.42	1.68	1.39	1.74	1.45	1.88
I2	1.19	1.2	1.18	1.24	1.19	1.27	1.13	1.27	1.09	1.19	1.04	1.21	1.1	1.26
I3	1.32	1.44	1.25	1.33	1.28	1.36	1.27	1.31	1.28	1.27	1.37	1.43	1.34	1.35
I4	1.47	1.54	1.45	1.47	1.44	1.48	1.44	1.4	1.42	1.4	1.45	1.31	1.37	1.18
I5	1.25	1.34	1.18	1.2	1.27	1.28	1.26	1.2	1.23	1.17	1.26	1.07	1.19	0.99
I6	1.08	1.11	1.28	1.34	1.24	1.26	1.25	1.35	1.25	1.29	1.32	1.38	1.35	1.39
I7	1.18	1.16	1.26	1.21	1.29	1.2	1.31	1.31	1.3	1.19	1.36	1.19	1.42	1.25
I8	0.94	0.92	1.01	0.99	1.01	0.97	1.05	0.99	1.12	1.1	1.03	0.93	1.1	0.94
I9	1.21	1.07	1.25	1.16	1.26	1.12	1.27	1.08	1.3	1.09	1.21	0.91	1.27	0.94
I10	0.85	0.86	0.91	0.91	0.88	0.89	0.83	0.89	0.85	0.9	0.87	0.91	0.96	1.02
I11	0.8	0.77	0.76	0.75	0.8	0.8	0.83	0.76	0.84	0.73	0.88	0.89	0.9	0.88
I12	1.09	1.07	1.1	1.09	1.06	1.03	1.06	0.97	1.02	0.89	0.96	0.85	0.96	0.81
I13	0.89	0.85	0.81	0.8	0.8	0.79	0.85	0.81	0.78	0.72	0.8	0.76	0.82	0.73
I14	0.83	0.78	0.74	0.73	0.76	0.71	0.8	0.73	0.8	0.7	0.84	0.69	0.79	0.6
I15	0.59	0.56	0.6	0.57	0.6	0.55	0.66	0.57	0.61	0.53	0.68	0.51	0.66	0.48
I16	1	0.87	1.02	0.9	0.97	0.84	0.96	0.79	0.95	0.71	1	0.7	0.97	0.67
I17	0.85	0.75	0.75	0.68	0.71	0.63	0.75	0.63	0.76	0.58	0.81	0.65	0.8	0.56
I18	0.78	0.71	0.76	0.75	0.72	0.64	0.77	0.67	0.8	0.63	0.87	0.62	0.85	0.61
I19	0.78	0.71	0.74	0.69	0.82	0.72	0.79	0.67	0.89	0.72	0.88	0.63	0.89	0.62

Mean Square (MNSQ); Estimates of fit (outfit-outlier-sensitive fit and infit- inlier-sensitive fit)

Infit and outfit MNSQ over time (19 items over seven days) were in the productive range of 0.5 to 1.5

However, the symptom item of “Runny nose,” item I1, indicated rarity later on in the progression of the cold, with higher outfit MNSQ values above 1.50.