clearly significantP < .001
The overall effect of pre-OSS groups was clearly significant ( χ 2 2 = 23.5 ; P < .001) and with no indication of interaction between pre-OSS groups and age groups ( P = .400) or gender groups ( P = .324).
The overall effect of pre-OSS groups was clearly significant ( χ 2 2 = 23.5 ; P < .001) and with no indication of interaction between pre-OSS groups and age groups ( P = .400) or gender groups ( P = .324).