. 2019 Jun 27;14(6):e0211442. doi: 10.1371/journal.pone.0211442

Table 3. Intraclass reliability correlation coefficient for overall PA and MVPA stratified by maternal age, SES and paid job during pregnancy in pregnant women belonging to the 2015 Pelotas (Brazil) Birth Cohort Study.

Intraclass reliability coefficient using the Spearman-Brown Prophecy Formula
	Overall PA							MVPA^a
	1 day	2 days	3 days	4 days	5 days	6 days	7 days	1 day	2 days	3 days	4 days	5 days	6 days	7 days
Maternal age (years)
<20	0.52	0.69	0.77	0.81	0.85	0.87	0.88	0.30	0.46	0.56	0.63	0.68	0.72	0.75
20–29	0.57	0.72	0.80	0.84	0.87	0.89	0.90	0.38	0.55	0.65	0.71	0.76	0.79	0.81
30–39	0.61	0.76	0.82	0.86	0.89	0.90	0.92	0.40	0.57	0.67	0.73	0.77	0.80	0.82
≥ 40	0.44	0.61	0.70	0.76	0.80	0.82	0.85	0.33	0.50	0.60	0.67	0.72	0.75	0.78
Skin color
White	0.58	0.73	0.80	0.85	0.87	0.89	0.91	0.39	0.56	0.65	0.72	0.76	0.79	0.82
Black	0.57	0.73	0.80	0.84	0.87	0.89	0.90	0.36	0.52	0.62	0.69	0.73	0.77	0.79
Brown/Yellow/Indigenous	0.55	0.71	0.78	0.83	0.86	0.88	0.89	0.34	0.51	0.60	0.67	0.72	0.75	0.78
SES (quintiles)
Q1(poorest)	0.59	0.74	0.81	0.85	0.88	0.90	0.91	0.39	0.56	0.66	0.72	0.76	0.79	0.82
Q2	0.53	0.69	0.77	0.82	0.85	0.87	0.89	0.35	0.52	0.62	0.68	0.73	0.76	0.79
Q3	0.60	0.75	0.82	0.86	0.88	0.90	0.91	0.34	0.50	0.60	0.67	0.72	0.75	0.78
Q4	0.55	0.71	0.79	0.83	0.86	0.88	0.89	0.36	0.53	0.63	0.70	0.74	0.78	0.80
Q5 (wealthiest)	0.56	0.72	0.80	0.84	0.87	0.89	0.90	0.37	0.54	0.64	0.70	0.75	0.78	0.80
Paid job during pregnancy
No	0.58	0.73	0.80	0.84	0.87	0.89	0.90	0.37	0.54	0.63	0.70	0.74	0.78	0.80
Yes	0.57	0.72	0.80	0.84	0.87	0.89	0.90	0.40	0.58	0.67	0.73	0.77	0.80	0.83
Pre-pregnancy BMI (kg/m²)
Underweight	0.57	0.73	0.80	0.84	0.87	0.89	0.90	0.36	0.53	0.63	0.69	0.74	0.77	0.80
Normal	0.58	0.73	0.80	0.85	0.87	0.89	0.91	0.40	0.57	0.67	0.73	0.77	0.80	0.82
Overweight	0.58	0.71	0.81	0.85	0.88	0.89	0.91	0.38	0.56	0.65	0.71	0.76	0.79	0.81
Obese	0.55	0.71	0.78	0.83	0.86	0.88	0.89	0.39	0.56	0.65	0.71	0.76	0.79	0.81

*SES: socioeconomic position; MVPA: moderate-to-vigorous physical activity; PA: physical activity; BMI: body mass index.

^a analyses were performed using log-transformed MVPA