Table 1 Characteristics of the Indian studies

Anand et al. [17], 2015

Urban

Participants from Delhi and Chennai who took part in Center for Cardio metabolic Risk Reduction in South Asia surveillance, cross sectional, random

12,271, 80%, > 20 years, mean age ± S.D.: 41.4 ± 12.7 years (Chennai), 44.4 ± 13.9 years (Delhi), 43.5% male

Anupama et al. [18], 2014

Rural

Participants from rural Karnataka who took part in a screening survey, cross sectional study, random

2728, 76.6%, ≥18 years, mean age ± S.D.: 39.88 ± 15.87 years, 45.6% male

Mahapatra et al. [19], 2016

Urban

Indian central government Employees in Delhi, cross sectional study, non-random

1104, Not mentioned, > 18 years, Not Mentioned, 61.4% male

Singh et al. [20], 2009

Urban, Semi Urban, Rural

Participants from Delhi and adjoining region, cross sectional, random

5563, 94.4%, ≥ 20 years, Not Mentioned, 60% male

Singh et al. [21], 2013

Urban

Participants attending thirteen academic and private medical centers in India participated in the study under the name of Screening and Early Evaluation of Kidney disease – SEEK, cross sectional study, non-random

6120, 92.3%, ≥18 years, mean age ± S.D.: 45.22 ± 15.2 years, 55.1% male

Trivedi et al. [22], 2016

Semi Urban

Participants attending a health screening camp in six towns of India, cross sectional study, non-random

2350, Not Mentioned, mean age ± S.D.: 48.16 ± 14 years, 61.2% male

Varma et al. [23], 2010

Urban

Indian central government employees in Agra town, cross sectional study, Not Mentioned

3398, 83.9% ≥18 years, mean age ± S.D.: 35.64 ± 8.72 years, 66% male

Varma et al. [24], 2011

Urban

Indian Army personnel in Agra town who were part of ‘Comprehensive Health Survey for Detection of Life Style Diseases at the local Military Hospital., cross sectional study, Not Mentioned

1920, 81.9%, > 20 years, mean age ± S.D.: 34.72 ± 7.57 years, gender distribution Not Mentioned