Table 4.

Logistic regression analysis of anaemia, iron deficiency (ID) and iron-deficiency anaemia (IDA) v. weight status among schoolchildren aged 7–11 years form Guangzhou, China (n 5295)

	Anaemia‡			ID§			IDA||
Weight status	AOR	95 % CI	P value	AOR	95 % CI	P value	AOR	95 % CI	P value
Normal	1·000	Ref.	–	1·000	Ref.	–	1·000	Ref.	–
Overweight	0·768	0·516, 1·143	0·193	1·044	0·656, 1·659	0·857	0·984	0·335, 2·889	0·976
Obesity	0·553	0·316, 0·968	0·038*	1·808	1·146, 2·853	0·011*	1·151	0·337, 3·394	0·823
Thinness	1·074	0·679, 1·699	0·761	0·443	0·179, 1·099	0·079	0·909	0·213, 3·891	0·898

AOR, adjusted odds ratio; ref., reference category.

Anaemia was defined as Hb concentration <115 g/l, as proposed by WHO in 2001⁽¹⁾.

ID was defined by a multiple-index model, as proposed by the Chinese Medical Association in 2010⁽¹⁶⁾.

IDA was defined as the presence of both anaemia and ID⁽¹⁾.

^* P < 0·05, assessed by multivariate logistic regression.

^‡The regression model was adjusted for age, gender, birth weight and food intake.

^§The regression model was adjusted for age, gender and moderate-intensity physical activity.

^||The regression model was adjusted for age and gender.