Table 4. Recorded variables for exposures/ risk factors for respiratory infections.

COHORT NAME	RISK FACTORS
	ENVIRONMENTAL	HOUSEHOLD EXP.	SOCIAL RELATION SHIP	SOCIOOE CONOMIC STATUS	BIRTH MODE	BREAST FEEDING	SIBLINGS	ANIMAL CONTACT	DAY CARE ATTENDANCE	VACCI NATION	NUTRITION	STRESS	FAMILY HISTORY
Pittsburgh	-	-	-	+	-	-	+	-	+	-	-	-	+
Adelaide-Cohort	+	-	+	-	+	+	+	-	+	-	-	-	+
Raine Study	+	+	+	+	+	+	+	+	+	+	+	+	+
New Mexico	+	+	+	+	+	+	+	-	+	-	-	-	+
VIGALL	-	+	+	+	+	+	+	+	+	-	+	-	+
Perth-Cohort	+	+	+	-	-	+	+	+	+	-	-	-	+
PEIC	+	+	+	+	-	+	-	+	+	-	-	-	+
Allergyflora	+	+	+	+	+	+	+	+	+	-	+	-	+
COPSAC 2000	+	+	+	+	+	+	+	+	+	+	+	+	+
COPSAC 2010	+	+	+	+	+	+	+	+	+	+	+	+	+
PASTURE	+	+	+	+	+	+	+	+	+	+	+	-	+
Kopenhagen-Cohort	+	+	+	+	+	+	+	+	+	+	+	-	+
Madigan Childcare Study	+	-	+	+	+	-	+	+	+	-	-	-	+
TEDDY	+	+	+	+	+	+	+	+	+	+	+	+	+
Utrecht-Cohort	-	+	+	+	+	+	+	+	+	-	+	-	+
STEPS	+	+	+	+	+	+	+	+	+	+	+	+	+
WHISTLER	+	+	+	+	+	+	+	+	+	-	+	-	+
DIABIMMUNE	+	+	-	-	+	+	+	+	+	+	+	-	+
NPICS	+	+	+	+	+	+	+	+	+	+	+	+	+
OrChid	+	+	+	+	+	+	+	+	+	+	+	-	+
PATCH	+	+	+	+	+	+	+	+	+	+	+	-	+
LoewenKIDS	+	+	+	+	+	+	+	+	+	+	+	+	+

+ yes

- data not recorded