Table 3.

Covariates according to diarrhoea in infancy and between 1 and 5 years of age

	1920–30 cohort				1931–39 cohort
	Diarrhoea in infancy		Diarrhoea aged 1–5 yrs		Diarrhoea in infancy		Diarrhoea aged 1–5 years
	Yes (n = 64)	No (n = 2096)	Yes (n = 32)	No (n = 2185)	Yes (n = 107)	No (n = 2879)	Yes (n = 23)	No (n = 2963)
Mean (SD)
Age at interview (years)	64.1 (2.62)	65.2 (2.91)	65.0 (2.92)	65.4 (3.01)	66.4 (3.01)	66.1 (2.84)	67.4 (2.67)	66.1 (2.85)
BMI (kg/m2)	27.4 (5.00)	26.9 (4.04)	26.1 (3.76)	26.9 (4.05)	27.7 (4.76)	27.3 (4.32)	28.1 (4.29)	27.4 (4.34)
Height (m)	1.67 (0.09)	1.67 (0.09)	1.68 (0.08)	1.67 (0.09)	1.67 (0.10)	1.68 (0.09)	1.67 (0.09)	1.68 (0.90)
Birthweight (kg)	3.46 (0.53)	3.50 (0.55)	3.59 (0.57)	3.51 (0.54)	3.37 (0.52)	3.43 (0.53)	3.45 (0.56)	3.43 (0.53)
Number (%)
Sex
Male	32 (50.0)	1262 (60.21)	16 (50.0)	1315 (60.2)	57 (53.3)	1517 (52.7)	11 (47.8)	1563 (52.8)
Female	32 (50.0)	834 (39.8)	16 (50.0)	870 (39.8)	50 (46.7)	1362 (47.3)	12 (52.2)	1400 (47.3)
Father’s social class
Non-manual	10 (15.6)	291 (13.9)	5 (15.6)	296 (13.6)	18 (16.8)	434 (15.1)	2 (8.70)	450 (15.2)
Manual	52 (81.3)	1684 (80.3)	25 (78.1)	1761 (80.6)	83 (77.6)	2267 (78.7)	21 (91.3)	2329 (78.6)
Unclassified	2 (3.13)	121 (5.77)	2 (6.25)	128 (5.86)	6 (5.61)	178 (6.18)	0 (0)	184 (6.21)
Current social class
Non-manual	26 (40.6)	814 (38.8)	14 (43.8)	849 (38.9)	46 (43.0)	1161 (40.3)	13 (56.5)	1194 (40.3)
Manual	38 (59.4)	1261 (60.2)	18 (56.3)	1315 (60.2)	60 (56.1)	1670 (58.0)	9 (39.1)	1721 (58.0)
Unclassified	0 (0)	21 (1.00)	0 (0)	21 (0.96)	1 (0.93)	48 (1.67)	1 (4.35)	48 (1.62)
Method of infant feeding
Breast	34 (53.1)	1399 (66.7)	21 (65.6)	1481 (67.8)	69 (64.5)	1717 (59.6)	15 (65.2)	1771 (59.8)
Bottle	4 (6.25)	117 (5.58)	3 (9.38)	118 (5.40)	6 (5.61)	268 (9.31)	3 (13.0)	271 (9.15)
Breast and bottle	26 (40.6)	580 (27.7)	8 (25.0)	586 (26.8)	32 (29.9)	894 (31.1)	5 (21.7)	921 (31.8)

Percentages do not always total 100 due to rounding.