Table 1

Distribution of radiation exposures, average baseline age and age-adjusted means and per cent characteristics for the sample of men and women available for stroke follow-up

Characteristic	Radiation exposure (Gy)
Characteristic	<0.05	0.05 to <1	1 to <2	≥2
Men
Sample size	1539	1266	376	130
Per cent of sample	46.5	38.2	11.4	3.9
Baseline age^* (years)	57±13	57±13	54±13	51±11
SBP (mm Hg)	135±24	135±23	133±20	136±19
T-CHO (mmol/l)	4.53±0.88	4.60±0.85	4.65±0.96	4.55±0.96
BMI^† (kg/m²)	21.9±3.0	21.8±3.0	21.7±2.9	21.5±3.0
Diabetes (%)	12.6	14.6	12.5	15.5
In Nagasaki at exposure	40.8	31.1	41.2	30.2
Smoking status (%)
Past	21.6	21.0	22.7	16.8
Current	66.6	65.6	64.2	68.5
Alcohol intake (%)
Light (<34 g/day)	44.3	42.0	42.9	44.1
Heavy (≥34 g/day)	38.3	38.3	41.2	38.4
Women
Sample size	2765	2720	531	188
Per cent of sample	44.6	43.8	8.6	3.0
Baseline age^* (years)	59±13	60±13	58±12	56±12
SBP^‡ (mm Hg)	134±26	135±26	136±25	137±26
T-CHO^§ (mmol/l)	4.94±0.91	5.02±0.96	5.09±1.01	5.15±0.93
BMI (kg/m²)	22.8±3.6	22.9±3.5	23.0±3.5	22.3±3.2
Diabetes (%)	6.7	8.4	8.0	7.2
In Nagasaki at exposure^¶	31.0	26.5	35.7	25.8
Smoking status (%)
Past	5.1	4.3	5.3	7.2
Current	10.6	14.7	13.8	13.1
Alcohol intake (%)
Light (<34 g/day)	20.7	21.3	21.3	16.2
Heavy (≥34 g/day)	0.8	1.9	1.3	0.0

Continuous variables are reported as means ± SDs. The remaining variables are reported as per cents.
↵* Significant decline with radiation exposure (p<0.001).
↵† Significant decline with radiation exposure (p=0.016).
↵‡ Significant increase with radiation exposure (p=0.013).
↵§ Significant increase with radiation exposure (p<0.001).
↵¶ Significant increase with radiation exposure (p=0.002).
BMI, body mass index; SBP, systolic blood pressure; T-CHO, total cholesterol.