Table 1

Demographic characteristics of children experiencing an acute respiratory tract infection event

Characteristic	Acute RTI events (n)			Mean monthly acute RTI event rate (per 1000 children)
	Upper RTIs (n=79 153)	Lower RTIs (n=56 011)	All RTIs (n=135 134)	Upper RTIs (0.51)	Lower RTIs (0.36)	All RTIs (0.87)
Sex
Male	46 116	31 912	78 028	0.58	0.40	0.98
Female	33 007	24 099	57 106	0.43	0.32	0.76
Age
0–4 years	67 462	51 109	118 571	1.16	0.88	2.05
5–12 years	11 661	4902	16 563	0.12	0.05	0.17
Region
North	28 074	18 257	46 332	0.57	0.37	0.93
South-West	34 496	23 759	58 255	0.50	0.34	0.84
South-East	16 553	13 994	30 547	0.46	0.39	0.86
Urbanisation level
Urban	64 939	46 739	111 678	0.51	0.37	0.89
Rural	14 184	9272	23 456	0.49	0.32	0.81
Socioeconomic status
Quintile 1 (most affluent)	12 508	8928	21 436	0.41	0.30	0.71
Quintile 2	14 507	9693	24 200	0.48	0.32	0.81
Quintile 3	14 808	10 043	24 851	0.50	0.34	0.84
Quintile 4	16 849	11 658	28 507	0.57	0.39	0.96
Quintile 5 (most deprived)	20 451	15 689	36 140	0.58	0.45	1.03
PCV vaccination status
PCV received	13 324	5619	18 943	0.69	0.19	0.88
PCV not received	65 799	50 392	1 16 191	0.47	0.39	0.86