Table 2. Reliability assessment: Item to total correlation of child hood SEP questionnaire .

	Variables	Crohnbach’s alpha value if one Item deleted
D1	Parental Occupation
1	Permanent income for father	0.67
2	Category of father’s job– Private/Government	0.51
3	Occupation of father	0.81
4	Permanent income for mother	0.67
5	Category of mother’s job – Private/Government	0.60
6	Occupation of mother	0.72
D 2	Parental Education
7	Education of father	0.80
8	Education of mother	0.83
D 3	Schooling
9	Medium of instruction at school	0.70
10	Enrolment in the school meal program	-0.58
11	Method of commuting to school	0.74
D 4	Household Assets
12	Having fulltime domestic help	0.53
13	Electronic appliances	0.77
14	Type of utensils	0.51
15	Having access to vehicles	0.59
16	Roof of the house	0.80

Note: Alpha value (Kline’s value) is >0.50 for the sample size 200. Now it is 16 variables distributed across 4 domains.