Single parent status and children’s objectively measured level of physical activity

Sports Medicine - Open

Table 2 Assessment of study quality

Studies	Where results biased due to low response rate?	Was the exposure ascertained throughout?	Did authors adjust for confounding factors?	Was there valid outcome data for at least 75 % of the study sample?	Did authors report the number of days of PA assessment?	Did authors report the length of epoch?
Bagley et al. [27]	-	?	+	+	+	+
Bradley et al. [28]	-	?	+	+	+	+
Hesketh et al. [5]	-	+	+	+	+	+
Sallis et al. [30]	-	+	+	-	+	-
Sallis et al. [29]	-	-	+	+	+	+
Sallis et.al. [8]	?	?	+	-	+	-
Eiberg Hansen et al. [22] CoSCIS	-	?	-	-	+	+
Riddoch et al. [20], EYHS Denmark, first cohort	?	+	-	-	+	+
McMinn et al. [26], EYHS Denmark, second cohort	-	+	-	+	+	+
Riddoch et al. [20], EYHS Estonia	?	+	-	-	+	+
Riddoch et al. [20], EYHS Norway	?	+	-	-	+	+
Riddoch et al. [20], EYHS Portugal	?	+	-	-	+	+

“+” adequate information provided for assessment; “-” inadequate information provided for assessment; “?” no information provided