Table 2

Per cent change in daily hospital admissions for pneumonia and 95% CI per 1°C change in mean temperature using alternative lags

Lag (days)†	OT (°C)	Cold temperature		Hot temperature
Lag (days)†	OT (°C)	ER‡ (%)	95% CI	ER (%)	95% CI
Single day	13
0		−2.05	−4.78 to 0.61	0.80	−0.90 to 2.51
1		0.43	−2.07 to 3.01	0.41	−1.26 to 2.11
2		3.06*	0.72 to 5.47	0.04	−1.62 to 1.74
3		4.85**	2.65 to 7.09	0.37	−1.28 to 2.04
4		4.88**	2.71 to 7.09	1.28	−0.36 to 2.96
5		2.85*	0.65 to 5.10	1.16	−0.48 to 2.83
6		1.39	−0.81 to 3.64	1.21	−0.41 to 2.86
Multiday	13
0–1		0.03	−2.62 to 2.75	0.13	−1.66 to 1.96
0–2		1.57	−1.26 to 4.48	−0.08	−1.96 to 1.83
0–3		3.67*	0.84 to 6.59	−0.38	−2.39 to 1.67
0–4		4.88**	1.89 to 7.95	−0.42	−2.53 to 1.75
0–5		5.21**	2.14 to 8.36	−0.62	−2.93 to 1.75
0–6		5.34**	2.04 to 8.74	−0.94	−3.42 to 1.60
0–7		5.10**	1.53 to 8.79	−0.48	−3.22 to 2.33
0–8		4.48*	0.72 to 8.37	−0.67	−3.47 to 2.21
0–9		4.01*	0.03 to 8.15	0.15	−2.81 to 3.20
0–10		1.43	−0.26 to 3.16	1.02	−0.52 to 2.59

*p<0.05. **p<0.01.
†Lag 0–6: single-day lag from 0 to 6; lag 0–1 to lag 0–10: multiday average of mean temperature (lag 0–1 means 2-day moving average of current and previous day values).
‡ER means excess risk, ER=relative risk (RR)−1.