Table 2. Demographic characteristics and underlying health status of children aged <5 years with severe acute respiratory infections in Matlab, Bangladesh, June–October 2010.

Characteristics	Frequency (%)		P-value
	Hospitalized cases, n = 65	Non-hospitalized cases,n = 76
Sex, male	44 (68)	45 (59)	0.3
Age in months, median (interquartile range, IQR)	9 (3–15)	23 (11–36)	<0.001*
Pre-existing medical condition†	2 (3)‡	0 (0)	0.1
Number of household members, median (IQR)	5 (4–7)	5 (4–7)	0.9
Number of rooms in the household, median (IQR)	2 (1–3)	2 (2–3)	0.2
>3 people per room in the household (crowding)§	26 (40)	16 (21)	0.01*
Monthly household income (US$), median (IQR)||	96 (71–143)	114 (71–143)	0.2

*P-value for nonparametric equality-of-median test.

^†We asked the parent if the case-patient had any medical conditions such as diabetes, chronic heart disease, chronic lung disease, asthma, chronic liver disease, neurologic/neuromuscular disease, hematologic disorder, metabolic disorder, immunosuppressive condition or cancer.

^‡One case had reactive airway disease and the other had congenital heart disease.

^§The median number of household members per 100 sq ft was 2.2 in rural Bangladesh [51].

^||One missing value in each group.